Overwhelmed but ready for action, five aspiring space explorers learn they have the power to create Voltron, the most powerful robot in the universe.

Shiro must draw on painful memories from his past when a massive evil robot threatens the peace on Arus, forcing the lions into action.

As one Paladin threatens to leave the team, invaders storm the castle and destroy its power crystal in an attempt to steal Voltron.

Hunk and Coran try to retrieve a new crystal from the Balmera while the rest of the team work to prevent Sendak from leaving the castle with Voltron.

On the way to the Balmera, the team stops to help two rebels on the run from the Galra. Lance is trusting, but Hunk is skeptical of their intentions.

Allura, Coran and the Paladins return to the Balmera to free the natives, but the arrival of a Galra ship could force Voltron into action.

As the Paladins scramble to ward off a Galra monster, Allura hopes that her ancient powers can heal the Balmera and save its people.

Allura considers making a heartbreaking sacrifice to save the team when the castle mysteriously turns on them and sends them hurtling toward doom.

The team stops at an isolated and seemingly insignificant Galra space station and discovers how the empire is gathering its energy from the universe.

Zarkon lures Voltron into a battle on his ship, and when one of the lions is captured the team must get creative to defeat the Galra and return home.