With Lance saved, the Voltron Force are heading back to Arus. They have to stop Zarkon, however with their robot lions destroyed, they're at a great disadvantage. But Queen Ariella reveals to them a way to bring the lions back.

While trying to take back Yellow Lion's lair from Black Draco, the Voltron Force learn of an alternate dimension where Voltron can be reconfigured into a powerful new form.

Zarkon invokes an ancient Arusian law, which allows him to challenge the best fighter to a battle. Lance and Lotor are selected to fight.

The shonga Dominus is back and Allura tries to make a home for him in the Castle. But it becomes obvious Dominus needs to go back to his actual home, the Stealth dimension. Joining forces with Kolak, Haggar and Lotor try to get Dominus back on their side.

While in another dimension, the Voltron Force encounter Kolak the Hunter, who is of the same race responsible for Dracotron. Kolak plans to use his Stealth technology to make the Voltron Force biomechanical beings like himself and only Pidge can save them.

Lance and Lotor get sucked into Claw Mountain. They arrive in a parallel universe where Lotor commands Voltron and the Castle of Lions, while the Voltron Force are considered rebels.

Allura learns special mind skills can allow the Voltron Force to control the lions without having to be in the cockpit. Pidge is unwilling to try this, though, since he was an outcast on a planet of telepathes. But the Voltron Force might lose to Zarkon in battle, if Pidge doesn't try.

The Voltron Force and Coran deal with space pirates to rescue Amalgamus. Once Amalgamus is saved and repaired, the Voltron Force attack Galaxy Garrison to force out Zarkon, Lotor and Haggar.

The Voltron Force are tricked into entering a replica of Castle Doom, where Haggar makes their nightmares become real.