A true story about Frank Abagnale Jr. who, before his 19th birthday, successfully conned millions of dollars worth of checks as a Pan Am pilot, doctor, and legal prosecutor. An FBI agent makes it his mission to put him behind bars. But Frank not only eludes capture, he revels in the pursuit.

Chan Wing Yan, a young police officer, has been sent undercover as a mole in the local mafia. Lau Kin Ming, a young mafia member, infiltrates the police force. Years later, their older counterparts, Chen Wing Yan and Inspector Lau Kin Ming, respectively, race against time to expose the mole within their midst.