Hong Kong crime thriller "Overheard" will open in theaters across China on July 24. The movie, starring Daniel Wu, Louis Koo, Lau Ching-Wan and Zhang Jingchu, tells the story of three investigators of a financial crime who wind up embroiled in the intrigue themselves. It is co-written and directed by Alan Mak and Felix Chong, the same duo behind the 2002 blockbuster "Infernal Affairs".