Assigned to track and apprehend a serial rapist, Inspector Wong (Chan Kwok-bong) tries to question the latest victim, psychiatrist / screenwriter (!) Mazy Hui (UN BAISER VOLE's Natalie Ng Man-yan, badly miscast), but she is too distraught to offer any leads. Flashbacks reveal her assailant to be Sin Ho-fun (Samuel Leung Cheuk-moon), a homely, put-upon crew member, whom Mazy tried to help via a free discussion session in her office. The paranoid and delusional Sin soon misinterprets one of her comments and, later that day, drugs and rapes the woman, the first in a series of assaults he perpetrates. Once she has recovered, Mazy and Wong join forces in order to apprehend Sin, who has now graduated to murder.

An accident draws strangers Rex, Amy and Ivy altogether on a remote island. Amy falls in love with Rex but not only having sex with Amy, Rex decides to make himself King of two Queens on the island throughout his life. Knowing what kind of person Rex is, Amy decides to leave the island with Ivy. Will fate treat them well?