RIGOR MORTIS stars action movie veteran Chin Siu-ho (Siu-ho) as a former vampire hunting actor who now finds himself reaching the end of the line as a washed-up star who is also separated from his wife and alienated from his son. Down on his luck and with barely a dollar to his name, he checks into room 2442 in the housing estate which is allegedly a haunted flat. His aim is to end his misery by doing himself in, but instead Siu-ho is interrupted by some of the other "occupants" of the building including a Taoist master-exorcist (Anthony "Friend" Chan), a traumatized housewife with a tragic past (Kara Hui), as well as a seemingly benign elderly woman (Nina Paw) who has an empty coffin conspicuously hanging in the middle of her apartment.
Soon it becomes apparent to Siu-ho that the people around him, and the situation is far from normal. Despite his lack of belief in superstition, Siu-ho is soon thrust into the battle of his life as vicious vampires having a lot of unsettled business begin to rise from the dead?