After absorbing Solgaleo, UB Black retreated into an Ultra Wormhole, but the Ultra Guardians are not far behind! Inside the Ultra Wormhole, they discover Poipole’s original home—an incredible world teeming with other Poipole, but everything is shrouded in darkness. They meet a formidable Pokémon named Naganadel, who explains that Poipole’s world could be ruined without the light from Necrozma—the true identity of UB Black and The Blinding One. But Solgaleo is in danger, too! Ash has a solution: help them all! By sending their own Z-Power to Necrozma, will our heroes be able to save Solgaleo as well?