Teddy Yu is a former secret agent turned chiropractor who thought he left his past behind. He teaches martial arts to his two kids. However, his past catches up to him as a rogue agent demands to know the whereabouts of an agent known as Dragon. Now, father and children must team up to stop the rogue agent and his goons.

Mike, Jean, Shoot and Q are a professional robbery gang working for Uncle Lam. Q loves his girlfriend Bo who loves decisive men and luxury life. Shoot loves exotic fishes and Jean. Jean loves Mike, but he is married to another woman and has a young son. Uncle Lam loves good meals and big money. After finishing successfully the most recent job for Uncle Lam, Mike and his team want to take a break. Uncle Lam insists that they take one more job, which is to rob a triad boss Chicken Sam who loves diamonds in the very literal sense of the word. The robbery doesn’t go too smooth; moreover, Tom Wai, a police officer who loves his job, is getting closer and closer…

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.