Ash has caught up to Lusamine with Solgaleo, but things are looking tense for his friends who are suffering at the hands of the Ultra Energy powered Pokémon owned by Lusamine. To top it off, with Lusamine having been fused with Nihilego, it's hard for Ash to rescue her as she attacks him. Lillie feels powerless to help her mother, but Ash soon discovers the ability to use a new move with Pikachu. Will they rescue Lusamine?