Thelma and Patsy find themselves in a spooky house inhabited by a nut who is a mechanical genius and has made a robot who does everything. The inventor manipulates the robot’s control board from a hidden room. The girls are soon in a panic.

Widower Dr. Matt Younger and his daughter go to London for a month of dirt-bike racing. While there, Dr. Younger is surprised by finding himself attracted to Catherine, a charming but elusive woman who seems to have some mysterious men following her. A romance slowly develops between the doctor and Catherine, but there are complications to their happiness.