Captain Man's old sidekick and nemesis, Drex, returns from the past with an army of cavemen to finish off Captain Man once and for all. Kid Danger may be the only one who can save Captain Man now.

Kid Danger and his friends try to figure out how to get Captain Man back from the past, while Drex furthers his scheme to erase Swellview's memory of Captain Man forever.

Kid Danger and Captain Man battle Drex on top of a blimp to stop him from erasing Swellview's memory of Captain Man. But when the blimp aims straight for the Swellview Baby Hospital, one hero must stay behind to save the day.