The Yau's brothers are a trio of scammers who make punishing baddies their mission. A misunderstanding leads them to fellow con artists the Lui's sisters, and they join hands to scam a notorious mob boss. Through a myriad of ingenious tricks and disguises, they bring the mobster to justice as romance blossoms swiftly—all's well that ends well.

When party girl Sasha Li blows through most of her trust fund, she is cut off by her father and forced to go back to China and work for the family toy business.