A monk turned body-builder, with the gift to see into people's lives, befriends a female cop, and uses his gift to change the force of Karma and her destiny.

Tensions arise when Jack Chan, a spineless constable who regards his work as a job but not a career, is partnered with an energetic and conscientious policewoman, Man Liu. When a serial killer emerges in Hong Kong, Man Liu swears to catch him. Jack is impressed by her bravery and decides to secretly protect her.