Five millionaires who have run afoul of the law are sent to prison, where they fall under the kindly supervision of Nick Burton, the humanitarian "czar" of the convicts. Because of Nick's intervention, young Dr. William Collins, who has been jailed for reckless driving, continues his valuable experiments with the deadly Malta fever virus under the supervision of the prison physician Dr. Lindsey. To facilitate the experiments, Nick convinces millionaires Bruce Vander and Harold Kellogg, who are in prison for income tax evasion resulting from corporate mismanagement, to donate enough money to insure a quartet of human guinea pigs. Meanwhile, Nick's vigilance prevents millionaires James Brent and Sidney Keats, two stock swindlers, from fleecing the inmate population with phony copper stock. After his experiment proves successful and he finds the cure for Malta fever, Dr. Collins has his medical license and respect restored and both he and Nick win paroles for their valuable contributions.