The security system at Bf alerts Mr On of the shoot out taking place. He immediately arrives at the scene with the police but it’s nearly too late. Chae woon has lost consciousness and is bleeding out while the other body guard Daesung has also been shot in the arm. The shooters are arrested and BF vehicles arrive and they quickly take Chae won to the underground basement of the company but it’s too late to do anything for him so they decide to replace his damaged cell with cultured ones, a feat they have been trying to accomplish but never had. Ms Hong who has since being discharged from the hospital joins them. It’s a success, shocking everyone because this is the first time since their experiment worked.
Meanwhile, Secretary Jeong is worried about them, given there’s been radio silence from everyone since the shoot out. She returns to the company building and runs into Yu jayu, on her way to talk to the police who had arrived to question her. Yu jayu is still in a daze and isn’t able to answer her questions coherently. When Secretary Hong asks why she’s alone, she simply replies that her body guard are injured. Secretary Hong leaves, feeling there’s something they are keeping from her. She asks Ai Yeongsil for the basement location but it replies that she doesn’t have access to go there.
Meanwhile, Yu jayu goes to the security room to be alone. She’s devastated after what happened and tries to ward off the voices in her head. After changing and washing the blood on her, she returns to the basement where Chae won is and decides to spend the night there saying she has nowhere else to go. Mr on knows she’s there for Chae won and tells her to worry more about herself but she ignores him and frustrated, Mr On leaves her alone. Yu ja Yu suddenly worries about who would feed Minsuk, Chae won’s cat.
Meanwhile, prime minister Lee’s father calls him, suspicious that he was the one who sent armed men to assassinate Yun ja Yu. They are aware that Chae Won was on the verge of death and thinking, they he is Yun ja Yu’s lover, they are sure she would do anything to keep him alive. But Prime minister Lee denies having a hand in the assassination.
Yun ja Yu with a horde of bodyguards goes back to Chae Won’s house. She’s surprised to see her other guard Daesung emerge from the house. He had just been discharged and had gone to check out the place before her arrival. Yun ja Yu enters the house and immediately pets Minsuk, Chae won’s cat. She then remembers all the domestic things Chae won used to do around the house and she does them.
Meanwhile, unknown to Mr On who took a nap while keeping watch over Chae won, he had regained consciousness and gets out of the glass container he was in. Chae won wears his bloody clothes and starts looking around for the exit but comes across body parts all stored in show glasses. He is shocked and calls Yun ja Yu, surprised that he’s alive. He confronts her about culturing human body parts and putting them in his body after seeing there is no evidence of the gun shot on him. He ignores the fact that Yun ja Yu is concerned about him and accuses her of dealing with body parts, the reason why she has been against collaboration with the government. Yun ja Yu promises to explain everything to him and tells him to rest. Just then, Mr On who has awaken comes by and tells him to get out. He shouts that he doesn’t have the right to judge them, not after they saved his life but Chae won ignores him and leaves the basement.
But on his way, he figured he may have been too harsh on Yu ja Yu. After all, she saved his life. Suddenly, his phone rings and his left ear gets sensitive to the noise, a side effect of the experiment. He picks up and it’s Prime minister Lee, requesting his presence at the former president’s home. When Chae won arrive, Prime minister Lee is in shock to see him alive and healthy considering he should have died from his wounds. He congratulates him for living but then tells him to stop leading his grandfather into thinking that there was another terrorist involved in the incident at his army camp instead of his friend that was caught. Chae won who is uncomfortable due to the sensitivity in his left ear and prosecutor lee’s words decides to leave but prime minister Lee continues talking, telling him he can’t turn things around but Chae won retorts, asking if he would be able to handle the aftermath if he finds out the truth. Although, prime minister laughs at him mockingly, he doesn’t seem deterred and he leaves, making the other man agitated.
Chae won notices he can hear even the tiniest of noises from his left ear which was damaged after the terrorist attack and that panics him. Meanwhile, Prime minister Lee’s father has always been obsessed with staying young and has a strong desire to be able to live a thousand years. He recalls his conversation with an NBA player ten years ago, where he tells him his dream. Now, in the present, he and his son are having breakfast. They have concluded that Yu Ja Yu’s experiment work in rejuvenating the body works. He plans to dissect Chae won’s body to find out how she did it. But Prime minister Lee warns against dragging too much attention to themselves. His father yells at him for taking their side but Prime minister Lee reminds him he was the one who taught him to be patient. When his father talks about taking over BF, he seems uncomfortable.
Chae won meets Yu ja Yu and her entourage in front of the company building. However, Secretary Jeong and Daseung are surprised that he looks well. Yu ja Yu and Chae won head to the basement where they do a check up on him. However, Chae Won looses his cool when he discovers that Mr On had purposely put a chip in his left ear to treat the injury he got during the war. Yun ja Yu asks Chae won why he didn’t treat it before but he replies that he was at risk of losing his legs and so didn’t want to become a burden to his family. He gets so angry that he’s almost unable to control himself from strangling Mr On. He then yells at Chae won for experimenting on him like he was cultured meat. He accuses her of being money hungry but Mr On cautions him, telling him he has no idea what’s really going on. Yun ja Yu tells Chae won to keep his word to protect her but still, he leaves and Yun ja Yu goes the opposite direction leaving Mr On trapped like he’s in the midst of a bickering couple.
Doseung snoops around looking for Chae Won. He finds him coming out of a room and and starts asking him how he’s doing but he gets the cold shoulder from himm. Meanwhile Yu Ja Yu summons Ms Hong, Mr On and Mr Seo together to thank them for the successful experiment and urging them to keep it a secret. She then asks to be left alone with Ms Hong and when the two women are alone, Yu Ja Yu asks if Professor Kim only pretended to be okay after his wife’s death because he didn’t want to be thought of as a suspect when he took out his revenge. But Ms Hong believes that he was influenced by someone and mentioned that there was a group he became a part of, for the families of dead cancer victims. But he suddenly stopped going and changed into an evil person.
After their conversation, Ms Hong leaves but gets hounded by secretary Jeong who tries to know the secret they are hiding. Judging from Ms Hong’s answer, secretary Jeong figures out that it’s a medical secret. Yu Ja Yu calls Mr Seo asking him to track the address of the welfare center professor Kim used to visit and then to give the address to Do Seung along with two new suits one of which should have been worn by Chae won. Mr Seo is confused but does as she says. However, when she’s done with the call, she leaves the hall only to find Chae won waiting for her. Awkwardness sets in as he tells her he returned because he had a job to finish. She then tells him to get the address of Professor Kim’s group from Mr Seo. Chae won tells her to return to his house later but Yu ja Yu responds she would soon move out.
Chae won meets with Mr Seo and Do Seung. He snatches the address from Do Seung and takes his suit leaving the office coldly. This causes Do Seung to have a fight with Chae won, feeling he is looking down on him because Yu ja Yu is now sleeping at his place. Mr Seo manages to seperate them. However, Chae won feels a little guilty when Do Seung tells him he regrets worrying over him after the incident.
They both pick Yun Ja Yu up and she lets them know she’s aware of their fight and asks them why they are still sticking together. But Do Seung tries to avoid the topic. They arrive at the Prime Minister’s house and when Yu Ja Yu goes in, Chae won leaves minutes later claiming to go to the hospital. However, he secretly went to visit former president Lee asking if he was the one who let him enter Bf or it was his grandson’s doing but the president acts like he’s at loss over what he’s saying.
Meanwhile, the prime minister seems very soft towards Yun ja Yu, even serving her culture meat and trying to make her feel comfortable as he apologises for what happened to her but is impressed that she overcame it. However, Yun ja Yu has her suspicions of him considering the timing of when the thugs attacked plus they were foreigners who seemed to be given information about her. Prime minister Lee is speechless as Yun ja Yu leaves and Chae won returns before she can notice he’s missing.
Soon afterwards, he gets a call from his father who has found out he invited Yun ja Yu, to his personal home, somewhere he doesn’t even allow him to be. He suspects he’s romantically interested in her but prime minister Lee tries denying it and cuts the call, shouting at his guards to find out who divulged information about his personal life to his father.
That night, Yun ja Yu is at Chae won’s home when she hears noises. She panics, thinking it’s an intruder but it’s Chae won. She breaks down and Chae won tries to comfort her, telling her the story of a world war two soldier who suffered a panic attack. Chae won reveals that Mr On told him the story of how Bf came to be. Professor Kim who was their teacher at the University had taken his students to a pig slaughter house and after seeing how the animals were treated, Yun ja Yu developed a phobia. She suddenly stopped school for two semesters only for her to return and tell Mr On of her dream to abolish the killing of animals for their meat. Mr On tells Chae won he misunderstood her intentions. Meanwhile, Yun ja Yu reveals the real reason she stopped school was that her identical twin sister who had just returned from abroad suddenly got sick from dementia caused by too much consumption of meat. She died and Yun ja Yu regretted that she cremated her because if she knew what she knows now, she would have kept her body and changed her organs, giving her a new life. She cries herself to sleep on the ground mentioning how she missed her sister.
The next morning, Yun ja Yu and Chae won sit down to have coffee together and Yun ja Yu asks her permission to take Daesung with him to investigate the group Professor Kim was involved in. She agrees and the two of them talk about their ideological differences. While he’s against cultured meat and immortality, she stands for it. He then gets up to change his clothes but thanks her for saving him. She as well thanks him for protecting her.
Soon we see Chae won and Haseung go to the welfare center together. They pretend to be nephew and uncle with Haseung lying that he is Professor Kim’s son. This way, they are able to find out that Professor Kim had a friend in the group called Park sang min and eventually got his address. They arrive at the address but discover that Park Sang min is hiding from them. Chaewon recognizes a particular car which he has seen parked in front of his house the day Yu ja Yu first arrived them. Turns out the car belongs to Park Sang min and they start giving chase. When Park Sang min figures he’s been followed, he starts to drive speedily. The car chase attracts the police attention and they also start chasing them.
Park Sang min encounters a road block and having no where to go, he gets out of his car and starts running but Chae won and Daseung continue to chase him separately but Daesung catches him first and the two begin to fight with Park Sang min threatening to stab him with a knife. Chae won is unable to find them so he takes out the ear piece he usually wears in his left ear to block out all noise. He soon traces the whereabouts of Park Sang min and Daesung but he’s too late. Park Sang min stabs Daesung in the back and runs away. He passes out in Chae won’s arms and while Chae won is trying to go after Park Sang min, he’s arrested by the police and he looks at Daesung reminded of his partner who had died during the terrorist attack at the camp. The episode ends.
