When Billie (Karin Mani) goes after a vicious street gang who murdered her grandmother, she's wrongfully imprisoned for not having a gun permit. When she's finally released, Billie has only her black-belt martial arts skills and a thirst for bloody revenge to aid her in her quest for justice. Turning into a one-woman vigilante squad, she becomes like a cat stalking her prey -- and no one had better get in the way of her avenging claws!