Daughter of the infamous gangster Zakimort, Fedra Garland adopts her fathers name after his death at the hands of his own gang. After finding out that her family wealth comes from illicit activities, she disguises her identity with a blonde wig, black leotard and a mask, and devotes herself to the fight against criminals. She is driven to avenge her father and offset some of the evil which he accomplished in life. At her side are the strongman Leo and Teddy the sharpshooter. Fedra's boyfriend, Lt. Gary Norton of Scotland Yard , is unaware of her double life, but has pledged to combat Zakimort's murder of criminals and robbers.