Officer Chan Ka Kui manages to put a major Hong Kong drug dealer behind the bars practically alone, after a shooting and an impressive chase inside a slum. Now, he must protect the boss' secretary, Selina, who will testify against the gangster in court.

Cousins Thomas and David, owners of a mobile restaurant, team up with their friend Moby, a bumbling private detective, to save the beautiful Sylvia, a pickpocket.

When a fellow scientist asks for Jack's help in locating the mausoleum of China's first emperor, the past collides violently with the present as Jack discovers his amazing visions are based in fact.