Their home planet of Thundera destroyed by an evil sorcerer who is intent on erasing all evidence that they ever existed, a race of humanoid cats arrives on a planet known as Third Earth in search of shelter. Little do they realize, however, that malevolent wizard Mumm-Ra has tracked them through space and has recently arrived on Third Earth to complete the mission that he started back on Thundera. As the frightened feline humanoids fight for their lives on an unfamiliar planet, a lone hero named Lion-O will emerge as the one leader who could save them from ultimate annihilation. Former video game art director Jerry O'Flaherty directs from a script by newcomer Paul Sopocy. ~ Jason Buchanan, All Movie Guide