Chinatown After Dark

The mysterious Lee Fong covets a rare jeweled dagger from China. He sends American Ralph Bonner to Shanghai to retrieve it, but, when Ralph returns to San Francisco, the dagger is stolen from him by Ying Su. Fong ends up dead, and Ralph and the dagger are missing. Ralph's brother, Jim, goes in search of Ralph and the dagger, but the cops believe he's the one behind the murder and the theft. Jim tries to clear his name.