Kung (Chow) is the spoiled youngest brother of three: no job, no education, plenty of money, plenty of girlfriends, and a good home, whom he shares with the two brothers Lo Leung and Fei, his sister-in-law (Lo Leung's unattractive wife), and his wise father, Mr. Lo. On his upcoming birthday, as a cruel but well-executed prank, Leung and Fei will feign a lottery win worth $30 million using a useless ticket and a recorded tape bearing the lottery pick from a previous night, all as Kung's birthday present.