Man Made Monster stars Lon Chaney Jr. as a carnival performer who transforms into a murderous monster after a terrible accident. On a dark and stormy night, a bus skids into a high-tension wire electrocuting all passengers but one: "Dynamo" Dan McCormick (Chaney Jr.), who survives because he has built up immunity to electricity through his carnival performances. Dan is now the perfect specimen for the evil experiments of mad scientist Dr. Rigas (Lionel Atwill), who is working to create a race of electrically controlled men to do his bidding. The innocent Dan agrees to let Dr. Rigas study him but soon turns into a voltage addict manipulated by the doctor's commands. Before long, Dan becomes a monster whose fiery touch can, and does, kill. His powerful currents send him on a rampage through the countryside and lead to an edge-of-your-seat climax!