Jill Trent, the Science Sleuth, was a female adventurer from an unknown American city. She solved crimes through combination of her detective skills and scientific ingenuity. Jill was assisted by her best friend, Daisy Smythe. Both Jill and Daisy were quite capable of handling themselves in the fight, demonstrating proficiency with guns and some basic, but effective, fighting skills. Jill and Daisy shared a quarter interest in a uraninite mine from Jill's uncle, Ned.