2002 Hong Kong film by Johnnie To, Wai Ka-Fai

Undercover cop Leung Foon is having trouble taking down the illegal trading operation headed by crime boss Ferrari. So to accomplish his mission, he asks for help from the renowned Master Wong, an expert in gambling tricks.

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.