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!