Brilliant brain surgeon Banzai has just made scientific history. Shifting his Oscillation Overthruster into warp speed he's the first man ever to travel to the Eight Dimension...and come back sane! But when his sworn enemy the demented Dr. Lizardo devises a plot to steal the Overthruster and bring an evil army of aliens back to destroy Earth Buckeroo goes cranium to cranium with the madman in an extra-dimensional battle that could result in total annihilation of the universe.