Following a lengthy pursuit, Derek Ho, Singapore's first serial killer, has been captured, convicted, and sentenced to death. While incarcerated, he is subjected to interviews by a team of leading psychologists. Their objective: to determine if he holds information regarding a list of women who disappeared during his crimes. A young psychologist on the team, Dr. Winnie Low, manages to connect with the evasive Derek. As Winnie delves deeper into the case, she uncovers a hidden truth from Derek's past – a revelation that sheds light on his transformation from an ordinary man into a notorious killer.