Murder, mystery and intrigue abound in this taut crime thriller. When a valuable and powerful jeweled dagger goes missing, rival factions vie for the fabled treasure. Carmel Myers stars as Madam Ying Su, the proprietor of an underground den of opium and prostitution who will go to any lengths to retrieve the dagger, which will give her control of Chinatown. Rex Reece plays American Jim Bonner, who is framed for his brother's murder, after his brother attempts to deliver the dagger to one of Madame Su's competitors. Billy Gilbert also stars as a fumbling detective.