Summary: The peaceful planet of Valoria is enslaved by the galaxy-conquering warlord Krulos and his Rulon armies. A small band of survivors, led by the heroic Questar, blasts off-planet and attempts to escape. Pursued by the Rulon armada, Questar is forced to activate the S.T.E.P. crystal and warp through time and space. At the exact same time Krulos locks onto the Valorian vessel with his tractor beam. Both ships are pulled through the portal and crashland on prehistoric Earth. Questar and the Valorians befriend their new gigantic dinosaur neighbours, while Krulos enslaves his with dreadful Brain Boxes. Having captured the most powerful dinosaur of all, Tyrannosaurus Rex, Krulos marches on the Valorian encampment to crush them once and for all...