The Bad Boy Squad, a variety of private detective agency, is composed of King (Ekin Cheng Yi-kin), Queen (Kristy Yeung), and Jack (Louis Koo Tin-lok), whose primary source of business is the reuniting of clientèle with their first flames, and when the trio of young operatives returns to Hong Kong from an assignment in Thailand and the Squad's next three customers supply photographs of lost loves, the women in the pictures appear to be the same individual.

Stephen is about to enter University. He's been with his girlfriend Sophia for a while but he still hasn't made love to her because she's shy. When Stephen goes to University, he meets Amy and suddenly finds himself torn between two women.