Overheard (2009)

The story revolves around three members of a police surveillance squad conducting an investigation into a financial investment group involved in criminal fraud. The focus of the plot, however, is actually on the three officers themselves who stumble upon an opportunity to capitalize on information they gathered during their surveillance.
Alan Mak, Felix Chong
Lau Ching-Wan, Louis Koo, Daniel Wu, Zhang Jingchu, Alex Fong, Dominic Lam Ka-Wah, Michael Wong, Waise Lee, Sharon Luk, William Chan Wai-Ting, Stephen Au, Queenie Chu, Henry Fong Ping, Felix Lok, Geoffrey Wong, Ben Yuen
tt1349853