A fierce robber has plotted a major heist. But unfortunately, his plan was unintentionally foiled by two dispirited middle-aged best friends, and the stolen cash disappears. As a result, the trio has to run from the pursue of a policewoman, as well as engaging in a firearm in order to reclaim the stolen cash, putting their life on the line.

Kei 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, 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.

21 years after a major armed robbery where the masterminds escaped, a video of the crime resurfaces causing the police to reopen their investigation.