The episode begins with a flash back to the past when Yeong won and Jae Jin are young. The two kids are offering their input to Sa gang’s new novel and Yeong won gives an intelligent answer. Mr Choi arrives suddenly, complimenting her response. He wants to buy the kids pizza but Sa gang is against instant food. Sensing a fight between the two adults, Yeong won suggests they eat crab soup. Yeong won and jae jin leave the two adults alone and Sa gang sarcastically mocks Mr Choi for suddenly trying to act like a parent.
Yeong won chooses Jae Jin’s outfit for him and when Sa gang sees it, she is curious to know the kind of person she would be. She takes the two to the dinner table and with a hand on Yeong won’s shoulder, says she should stay for dinner.
It’s now the present, Jae Jin is watching the news concerning his suicide on tv when Se na suddenly tells him to return home but he avidly refuses. However, he gives in and now, Yeong won is about to run him over with her car, not minding that Sa gang is with her. However, she stops herself at the last minute and Sa gang immediately rushes to check on Jae Jin. Yeong won warns him not to step into her house which leaves Sa gang shouting after her that the house isn’t hers.
Do hyun isn’t happy to see his father. Tae Oh appears unsurprised at his appearance. When Jae Jin goes to talk to Do Hyun, Tae oh suddenly informs Yeong won about Do hyun ditching cram school to spend time with him and his girlfriend. He apologises for it and Yeong won thanks him for informing her.
Do hyun speaks with his father. He is dissapointed in him and asks if he will divorce his mother. Jae Jin doesn’t give a direct answer, implying it when he says that he would always be his father. He admits feeling lost, not knowing what he really wanted but now, he just wants to discover himself. Yeong won overhears the two discussing outside Do hyun’s door. When Jae Jin emerges, Sa gang suggests the three of them have a talk.
She tries to lighten the tension but it’s impossible as Yeong won expresses her dissapointment towards Jae Jin for cheating on her and performing ghost surgeries. She doesn’t care to know his reason, declaring him a coward and that nothing can justify what he did. She leaves in anger.
Sa gang tells Jae Jin that he has been decieved by Se na but Jae Jin foolishly thinks she’s harmless. Sa gang muses that he has fallen prey to the evil one.
At her office, Yeong won’s secretary brings her charts from her old counseling shows where she counseled children. Her. secretary asks what is really going on with her and Yeong won admits that Se na is blackmailing her and she would want to find out why.
Se na visits an orphanage home with gifts. One of the nun in charge informs her that one of the children May is in a bad mood Se na goes to her. May is drawing, looking upset. She doesn’t care about the doll Se na brought. She’s sad because her mother didn’t pick her up from the orphanage like she promised. Se na in turn reminds her that she went on her promise not to believe her mother would return. She takes her hand and says, she’ll make it possible so she doesn’t keep a failed promise.
Dr Oh arrives at the clinic ignoring the rennovation sign. She pulls out Lee se na’s file and asks Kyung Tae to investigate her so she can find Jae Jin. Kyung Tae is frustrated by her obsession. Just then, Tae Oh arrives claiming he was passing by and saw the door open. Dr Oh lies she came to clean up and right then, Tae oh sees the file recognizing Se Na. Kyung Tae tries to stop him from prying but Dr Oh sends him away.
Alone, Tae oh suddenly says that Jae Jin had a crush on her when they were young and would have married her it it weren’t for Sa gang. He assures her that Jae Jin knows the truth about her and that she shouldn’t worry. Dr Oh suddenly starts to tear up. She tells him to leave and that she will think about it when Jae Jin returns but Tae Oh informs her that Jae Jin is already home.
Jae Jin invites Young min to the house. When Yeong won sees him, she’s unhappy but her attention is distracted by Dr Oh who arrives claiming Jae Jin invited her as well. Everyone seems happy to see Jae Jin. Even his Aunt, Ms Choi arrives much to Sa gang’s annoyance. Ms Choi is busy making noise and during that time, Young min asks Jae Jin for money which he promises to give that night.
However, he shocks everyone when he leads them to the dinner table and it’s snacks that are there. He reveals that they are his favorite food which he never had the chance to eat at his home and that the person they have known this whole time is fake. His life was a lie. He pretended to be a good son and a loving husband but outside he was making Dr Oh perform his surgeries. His mother had forced him to be a doctor, bringing in a substitute doctor to perform his surgeries. Sa gang tries to brush it off with a laugh but Jae Jin exposes more, revealing that Yeong won’s father was framed by his father and that he was innocent. Yeong min is in disbelief after hearing this. Sa gang tries to stop him from saying more but he further exposes that his mother knew about the framing all along and to keep their secret, she brought Yeong won to the house and even planned everything including their marriage. As proof, he plays an audio of Sa gang yelling at Mr Choi for pretending to be good to Yeong won. Mr Choi in turn reminds her how she decided to bring Yeong won to live with them because she felt she might want to find out about her father’s death.
The recording ends. Young min can barely stay so he leaves so does Jae Jin. Sa gang goes after him and Yeong won follows. Meanwhile, Dr Oh is happy about what’s going on but they are all unaware that Se na is watching everything from a hidden camera.
Yeong won confronts Sa gang for only caring about her son and for lying to her the entire time. She then finds Jae Jin parking his bags. She tries to stop him letting him know that Se na is only using him to destroy their family but Jae Jin confirms that this was his choice. He only wants to live freely, away from her. Yeong won watches tearfully as he leaves. He drives off to meet Se Na unaware that Yeong won is following him.
Jae Jin recalls how Se na saved him from jumping off a building and committing suicide. She encouraged him to cut ties with his family like how she cut ties with hers. He smiles, thinking of how he can finally be with her. He arrives at an airport unaware that both Yeong won and Sa gang had followed him. But Se Na is suddenly not picking up his calls.
Instead, she’s meeting another man who is shockingly Mr Choi’s body guard Mr An. Mr An wants to travel right away with her but Se na is irritated, saying that she still has something to do. He shouldn’t rush since they will be together forever. Meanwhile, she’s searching her internet on how to get rid of a dead body. Mr An is worried about her revenge but Se na replies that seeing Yeong won hurting is her only cure. She wants Mr. An to install more cameras in the house.
Se na sees her three targets in the airport satisfied at their distress. The last flight to Hawaii is announced. Jae Jin leaves the airport dejectedly. Following his departure, Yeong won also leaves, same with Sa gang.
Yeong won follows Jae jin to the clinic and shows him the blackmail picture Se na sent to her but Jae Jin is still in denial. She yells that she may harm their son next but that doesn’t phase him. She then grabs his phone to check his call history realising that Se na called at very convenient times. Yeong won figures out that Se na has been watching them the whole time.
Sa gang goes to Kang Sung to seek comfort from him whereas Yeong won finds the hidden cameras in her house.
Kyung Tae comes to see Yeong won after his investigation on Se na. He describes Se na as a crazy person whose three husbands died mysteriously. He provides Yeong won with a video of Se na’s interrogation after her last husband’s death. She seemed weird as she described how she wanted to protect her sister becaise she loved her very much. She had even killed a cat because it hurt her sister and got rid of everything her husband didn’t like. The detective suggested she get psychiatric help for her obsession with love. As soon as he said that, she attacked the detective, repeatedly banging his head on the table. Kyung Tae thinks she’s a psychopath.
He reveals more, that she’s the first daughter of a family who died in a fire She claimed she was sleep walking during the incident and can’t remember much of what happened. She was later adopted by a family in Norway. However, Kyung Tae can’t understand why she said her parents died in a plane crash. Yeong won concludes she’s a dangerous person.
Yeong won sends Se na a text message asking why she killed her sister whom she claimed to love. Se na becomes enraged and is shocked when Yeong won is on her laptop screen, looking directly at one of her hidden cameras and smiling.
