Princess Allura is preparing for her coronation as the rest of the Voltron Force looks on. After Nanny insults them, the guys decide to check the monitor to see if there is any trouble. They discover that Pidge's home planet, Balto, is under attack by Zarkon's forces. Pidge said that his family was moving to a new planet, but he is not sure if they made it out in time. Keith, Lance, Pidge, and Hunk decide to head for Balto, but are cut off by the castle guards. Coran tells them that they must stay and protect planet Arus. He tries to place them under house arrest, but the Space Explorers quickly subdue the guards and head for Balto. Once there, they are confronted by Lotor and a new Ro-Beast. Back on Arus, Allura receives a telepathic distress message from Keith. She must now decide whether to stay and protect her planet, or to go and help her friends.