Tom Edison (no, not that Tom Edison) is a hopeful janitor who dreams of becoming a scientist – and Dr. Morice is a shy scientist who dreams of making friends. When an accident at the lab sends them back in time to the stone age, Tom and Dr. Morice must work together to face down cavemen, saber-tooth tigers, and other BC hazards, with only one problem: Tom isn't very good at science, and Dr. Morice isn't very good with people.