Can the Voltron Force pilots survive their deadliest challenge yet: the menace of five evil lions, capable of forming an exact copy of Voltron? It's been ten months since the death of the nefarious King Zarkon and the fall of Planet Doom. Now, Prince Lotor - heir to Zarkon's throne and one of the galaxy's most wanted terrorists - has returned with a promise to disarm his forces and make peace. While the Galaxy Alliance welcomes him with diplomacy, Commander Keith Kogane can't shake the feeling that something is wrong... a suspicion proven correct when a near-indestructible Voltron double appears and lays waste to Earth's moon! How will Keith convince his friends that Lotor is responsible, when Planet Doom itself is the evil Voltron's next target?