Undefeated female fighter Chanyo Ta discovers her beloved trainer has gotten involved with drugs. When she tries to stop him, he becomes enraged and assaults her, ultimately raping her. As a result, she is kicked out of the gym and her fighting career is destroyed. Later, she goes undercover as a narcotics investigator and infiltrates her trainer's hideout, but is captured. His henchmen then swarm in one after another, attacking her and putting her in grave danger.