Johnny Manton steals a cap from a museum reputed to give its wearer great intelligence, but Manton doesn't know that the cap only allows itself to be used for good.
Due to a mixture of elements from a meteorite and scrap metal from an atomic research lab in his ID tag, inmate Chick Durant is able to leave his cell for 25 minutes at a time. But Durant is stuck on an uncharted island when he reshapes his tag, altering the mixture.