Engineer Jim Ripple invents universal robots to help workers, being himself from a workers' family. He theorizes that cheap production will make all goods so cheap, that Capitalism will fall. The workers do not share his view and his family considers him a traitor. A key element of his invention is a high-capacity capacitor that powers the robots. The government becomes interested in the invention, because the robots can be used as a weapon as well. Ripple is given a top secret factory and funding so that he can produce robots. The robots are controlled either by radio or by sound, for which purpose Ripple uses a saxophone. On the day of a universal workers' strike, the administration of a factory where the Ripple's brother works, located in the same town where the robot producing plant is located, replaces workers with robots. A workers' delegation visits the factory to see that there are no strike breakers, and finds that actually it is the robots who work.