After a long, arduous hunt, Derek Ho, Singapore's first serial killer has been captured, tried and sentenced to death. As he awaits his fate in prison, a team of top psychologists is assigned to interview him. They must find out if he has any information on a list of women reported missing during the period of his killing spree. It takes a young, ambitious member of that team, Dr Winnie Low, to break through to the stubbornly reticent Derek. Winnie embarks on a journey to solve the mystery, unlocking a secret deep within Derek's past... one that gives her an insight into how he went from an ordinary man to extraordinary killer.

Struggling to come to terms with the death of her mother, Kim suddenly has to deal with a new mother in her life. Choon, Kim's father, brings home a woman one day and announces his decision to marry her. A series of mysterious and terrifying incidents start to occur at the family home after their return. Could it be the jealous spirit of Choon's dead wife that has come back to show her displeasure at being replaced? Or is there something more sinister? What unravels is a tale of unspeakable evil that threatens to destroy the family. What deep, dark secret is Na, Choon's new wife, hiding from them? Can Kim help save her family from complete destruction?