A gang of girl hooligans, the Vigilante Trio, is robbing the rich citizens of New York and giving to the poor (while keeping quite a bit for themselves). Heiress Tia Noel wants to stop them, especially after learning her Aunt Capucine has become their latest target. She gets her chance after she accidentally ingests a potion her boss, Dr. Josiah Batterson, brought back from the jungle. It turns her into a feline, muscle-bound, bulletproof menace to bad guys (and girls). Can Tia save her aunt before it's too late?