Skinflint businessman Richard (Leung) doesn't feel bad when he sacks his employees and secretary to cut unnecessary costs. He also doesn't bat an eyelid when his gold-digging girlfriend leaves after he refuses to give her money. She gets her revenge by cancelling his credit cards and giving away his furniture. Suddenly destitute, he's forced to rely on the generosity of Choi (Shu Qi), a good Samaritan who helps him out even though she thinks he's a scumbag who makes a habit of cheating women out of money.

Employees working at a high rise building begin encountering a series of strange occurrences. Ken, a recent hire who attracts to the lovely, but spiritually harried Shan. Meanwhile, Pat is apparently terrorized by the evil demon who resides in the last stall of the woman's bathroom. And Richard, a mean boss of another company in the same building, wants to get rid of his long-time employee Mary and begins to suspect that his entire staff has become ghosts.

Ko Chun, a renowned gambler, loses his memory in an accident and starts behaving like a child. Little Knife, an amateur gambler, offers him shelter and realizes that he has a penchant for gambling.

A naïve young tax collector for the imperial government winds up spending the night in a haunted temple. There he falls in love with a beautiful woman who, unfortunately, is dead. With the aid of a powerful Daoist Swordsman, he must defeat undead hordes, overcome a sinister Tree Demoness, and descend to the pits of hell, to fight for the spirit he loves.