Clint Adams heads for San Francisco, hoping to combine business with pleasure. The pleasure side looks up when he discovers a beautiful Chinese woman waiting in his hotel room. But the pleasure ends abruptly when a martial arts expert knocks Clint unconscious. The Gunsmith awakens with a lump on his head and a dead girl in his bed. It looks like Clint has walked right into the middle of the Yellow Serpent Tongs deadly criminal dealings—now the Gunsmith must clear himself of murder and crush the Tong if he ever hopes to leave San Francisco alive!