The Alolan night sky is the backdrop to adventure when the Ultra Guardians try to send an Ultra Beast back to its own world and find themselves caught in the sparks of an explosive competition! Ash heads to Ula’ula Island for his next grand trial—and Team Rocket is there too, seeking a Z-Ring at the Boss’s command. Both journeys lead them to the kind-hearted Acerola and Kahuna Nanu, a wily Dark-type Pokémon specialist who tries to dodge his duties but pulls out some nasty tricks in battle. Will either group succeed, or must they walk away empty-handed? Finally, our heroes are moved when observing a beautiful Minior shower, and Lillie must keep her cool when the friends become separated inside Mount Lanakila!