Taesoo, a top profiler, wants to be a good father by leaving work on time. However, he faces challenges with ongoing murder cases and troubling signs that his daughter may be involved in one.
Taesoo wants to trust his daughter, but evidence suggests Habin is involved in a troubling incident. Meanwhile, Daehong uncovers that Taesoo has a connection to the case, raising questions about what Habin might be hiding.
Team Leader Oh monitors Habin, while Eojin is upset with Taesoo for breaking rules. Taesoo is shocked to learn his daughter's alibi was false. On the day Song Mina died, Habin was at the scene of the crime.
The possibility of a serial murder case is revealed by Habin's bag strap. Taesoo becomes fearful of the secret that Youngmin and Habin are not revealing, and the police come to Taesoo's house again.
A year ago there was contact with the deceased ex-wife. Taesoo learns about Jisoo's shocking secret, while Jun-tae becomes increasingly sensitive as the case progresses.
Daehong is disappointed by Taesoo's changed appearance, while Eojin disapproves of Daehong's emotional involvement in the investigation. As events unfold, Daehong uncovers Taehong's hidden past.
Another murder occurs. Taesoo decides to trust Habin, but there is no clear evidence proving that she is not the killer, leaving him frustrated. Meanwhile, Juntae arrives at the police station, claiming he wants to confess.
A mysterious envelope arrives at the police station. Ducheol blackmails Taesoo using Habin. Habin learns the secret behind Jisu's death, while Eojin firmly suspects Habin as the killer.
The violent crimes unit identifies Habin as a suspect. Taesoo realizes there's no escape this time. He desperately tries to block the investigation, but soon faces a shocking truth through the evidence seized from Habin.
The true killer is revealed, but the motive behind the murder remains unclear. Habin refuses to let go of the intent to kill, leaving Taesoo with deep guilt. Can this father-daughter duo live a normal life from now on?
