In Episode 7, Jin-hyeok is taken into custody by the police for the abduction of Soo-yeon. He requests Eun-joo to take care of Sun-hui while he is escorted to the police station. At the same time, Dong-ho’s boss praises him for providing the necessary evidence to apprehend Jin-hyeok. He interrogates the lawyer as Sun-hui stays at home, feeling guilty for Jin-hyeok’s fate.
A flashback scene depicts Sun-hui phoning Hyun-min from the hospital to inform him about Jin-hyeok’s role in Soo-yeon’s abduction and vanishing. In the evening, Eun-joo ventures out in the heavy rain as Sun-hui sobs in the bedroom. Hyun-woo contacts Soo-yeon and requests to meet her alone. Sung-woo interrupts him just as he is about to meet her in a secluded alleyway.
Sung-woo brings Hyun-woo to a coffee shop and interrogates him about Soo-yeon. Hyun-woo discloses witnessing Soo-yeon entering the car on the street and Sun-hui being pushed in front of the car. Sung-woo discloses that Hyun-woo was mistaken as Soo-yeon was actually deceased. Hyun-woo appears unconvinced and attempts to locate Soo-yeon.
Nevertheless, out of nowhere, a man in a black raincoat unexpectedly attacks him with a knife. Sung-woo locates Hyun-woo and quickly takes him to the hospital. In the meantime, Dong-ho attempts to question Jin-hyeok and discovers that the attorney’s vehicle was stolen the same night Soo-yeon went missing. Jin-hyeok stated that his car and the van that nearly hit Sun-hui at her school were both taken without permission.
Dong-ho attempts to extract a confession from the lawyer while Jin-hyeok inquires the cop about the evidence he has against him. He inquires about the police finding Soo-yeon’s body and accuses them of unlawfully getting her blood from his vehicle. That evening, Sun-hui discovers her room and the living room have broken glass windows. She stumbles on a piece of glass and hurts herself.
She sees a person wearing a black raincoat and holding a knife, so she begins to flee from him. Dong-ho finds out from Sang-woo that Soo-yeon stabbed Hyun-woo. At the same time, Eun-joo arrives at the police station. Sun-hui dashes out of the residence and is pursued by Soo-yeon, who is dressed in a black raincoat.
Eun-joo informs Dong-ho that she will testify on behalf of Jin-hyeok and provide his alibi to the police. Soo-yeon confesses to Sun-hui that she stabbed Hyun-woo and then strikes Sun-hui with a spade, causing her to lose consciousness. Soo-yeon forcefully takes Sun-hui to her room and secures her to a chair with ropes. Soo-yeon begins to pour paint thinner in every corner of the room and warns to cause Sun-hui the same pain she experienced.
Soo-yeon accuses Sun-hui of attempting to murder her following her own killing of Kyeong-ho. She becomes angry when Sun-hui claims she didn’t murder Kyeong-ho. Eun-joo’s statement leads to Jin-hyeok’s release from jail. He discovers that Hyun-woo was injured by a knife and heads to the hospital to visit him. Meanwhile, Sun-hui attempts to help Soo-yeon relax. She mentions the event that led to Gyeong-ho’s demise.
Sun-hui claims that Gyeong-ho was alive while her mother checked on him. She admits that Eun-joo did not start the fire at Kyeong-ho’s house. This further provokes Soo-yeon, leading her to accuse Sun-hui of persuading Jin-hyeok to attempt to harm her. Right at that moment, Hyun-min arrives at the house and sees Soo-yeon attempting to murder Sun-hui. Sun-hui sees Hyun-min and shouts to him, which catches Soo-yeon’s attention.
The scene progresses as Jin-hyeok and Eun-joo go to see Hyun-woo in the hospital. Dong-ho expresses remorse to Jin-hyeok and informs him that Hyun-woo had confirmed that Soo-yeon was the one who had stabbed him. Eun-joo attempts to contact Sun-hui for a welfare check, but the call is unsuccessful. She becomes anxious and confides in Jin-hyeok. Dong-ho calls the police and hurries Jin-hyeok and Eun-joo to the residence.
However, upon their arrival, the Choi family home is engulfed in flames with Sang-woo unconscious outside the residence. Jin-hyeok and Eun-joo are concerned about Sun-hui’s safety as firefighters work on extinguishing the fire, while Hyun-min drives her to safety in his car. A scene from the past reveals Hyun-min igniting a cigarette and tossing it into Sun-hui’s room to start a fire in the house.
Soo-yeon releases Sun-hui and they attempt to flee from the house before being halted by Hyun-min. Sun-hui is bewildered while Hyun-min commands Soo-yeon to enter the house and perish in the fire. Sun-hui attempts to prevent him from stopping Soo-yeon from escaping but Hyun-min shoves her. Sun-hui is rendered unconscious. Sung-woo arrives and threatens to harm Hyun-min after seeing him threatening to kill Soo-yeon.
Hyun-min deceives Sung-woo, claiming that Soo-yeon was responsible for setting the house on fire and attempting to harm Sun-hui. Sung-woo trusts Hyun-min, but Hyun-min betrays him by stabbing the police officer with a knife and rendering him unconscious. He snatches Sung-woo’s gun and warns that he will kill Soo-yeon. Hyun-min requests that Soo-yeon retrieves her knife and insists that she was the one who stabbed Sung-woo.
The scene ends with a gunshot as Hyun-min later claims that it was Sung-woo who killed Soo yeon.
In the epilogue, Hyun-woo envisions owning a large house in the future where his diligent parents and siblings can live joyfully, bringing the episode to a close.
