 Four people form an unlikely alliance to sting a three-man credit-card scam operation. Behind the front of an electronic appliance store, Mr. Chiang and his bumbling nephew Wuchi, aided by a technical wizard called Blond Chiang, operate a high-tech credit-card scam. Sisi, one of their victims who works for the bank whose cards are being forged, joins forces with Do Do, a spirited collection officer for a finance company, with Wu, a good-looking petty thief who owes Do Do s company money, and with Lulu, Sisi s friend who lives in Wu s apartment. Wu pretends to work with Chiang, Lulu pretends to like Wuchi, Do Do dons peasant dress, and the trap is set.