When three kids explore Charterville's haunted Hillhurst Mansion on a dare, they discover a lot more than they bargain for! The trio find a wild and wacky phasm named Flabber, who changes their lives forever when he grants their wish to become the superheroes they've read about in BeetleBorgs comics. However, not only does Flabber grant the kids' wish, but he also accidentally facilitates the escape of supervillains from the comic books as well! Now it's up to these three newly tapped superheroes - aided by a friendly neighborhood phasm and armed with fantastic powers and awesome vehicles - to save the world from the forces of darkness that threaten the peace and harmony of all mankind.
On a class excursion to a cave with stone age paintings the clumsy Rex gets lost. A mysterious crystal opens a gateway in time and sets him back to the stone ages, where he meets a group of prehistoric fellows and the gorgeous Eba. While teaching her English and doing some pseudo-research on her fellows, his main goal is to get her sleeping with him. However the curiosity of the clan chief disturbs his attempts.
