The stooges become detectives and go to the aid of girl in the clutches of a mad scientist. The boys arrive at a spooky mansion where the madman is building a mechanical man that needs a human head. After declining the opportunity to supply a stooge-head for the experiment, they find the girl and escape, only to wind up in a car driven by the headless robot.

The stooges are artists who want to marry their models; "Moella", "Larraine", and "Shempetta". The girls' father doesn't approve, so the stooges tickle him into submission.