Discover a spectacular animated world where good meets evil in a sci-fi collision of high technology and mythic fantasy. When the Lightstar Crystal is split into two, the kingdom of Luminicity is plunged into darkness and divided into two warring factions. Now, the rightful heirs to the throne must come together to battle the powerful forces of the evil Baron Dark and reunite the two halves of the crystal before their world slips into the shadows forever!

For the first time, the humans discover a way to stop a Skeleton Warrior when Talyn discovers that by removing a Warrior’s heartstone, that Warrior is instantly refleshed. Ferris leaves the Legion of Light, unable to trust himself after his transformation, but he finds enough courage to warn the Legion of Light of a surprise attack and say goodbye to Talyn.

A massive dynamite explosion set off by Baron Dark traps the Legion Of Light inside a mountain. As they find their way out, Guardian retells Dr. Janov’s Futurescope stories to the Lightstar siblings. But as Guardian’s memory unfolds, a dreamscape of a life and death struggle between our heroes and the Skeleton Warriors begins to haunt the present. The Legion of Light barely makes it out alive before Grimskull befriends a wild wolf and saves Guardian from a close call with death.

In preparation for the final battle, the heroic Legion of Light searches for the missing half of the Lightstar Crystal. Meanwhile, Ursak, Talyn and Prince Lightstar plan to free Dark’s prisoners, but their plans are almost foiled when Baron Dark releases his dragon upon them. Grimskull approaches the Cavern of Light but Baron Dark intercepts him on a treacherous bridge. As a fight ensues, Grimskull falls from the bridge into the gorge far below. Moments later Prince Lightstar, Talyn and Ursak arrive but cannot find Grimskull anywhere. Where’s Grimskull and what happens now?