Kei (Simon Yam) is the experienced leader of a team of pickpockets — also known as "Sparrows" in HK slang. He enjoys a carefree lifestyle taking photos. One day a dashing beauty, Chun-Lei (Kelly Lin), suddenly appears in Kei's viewfinder. Kei is mesmerized. But behind Chun-Lei's attractive facade lies a mysterious past and a mission to set herself free.