The Bad Boy Squad is a diverse private detective agency featuring King (Ekin Cheng Yi-kin), Queen (Kristy Yeung), and Jack (Louis Koo Tin-lok). Their main line of work involves helping clients reconnect with their first loves. After completing a mission in Thailand, the trio returns to Hong Kong, where their next three clients present them with photos of their past loves. Intriguingly, the women in these photos all seem to be the same person.