Shanghai Dawn.

A strange murder case hides more secrets than you can imagine… In 1930s Shanghai, a detective finds himself embroiled in an intriguing murder case, with all clues pointing to his ex-girlfriend as the main suspect. As he investigates further, he uncovers hidden political agendas and widespread corruption lying behind the murder. Even while he grapples with his own emotions and the dark secrets he has discovered, a helping hand extends from an unexpected figure.