After the Isshu League Higaki Tournament, Satoshi and his companions embark on a new quest to the enigmatic 'White Ruins' linked to the legendary Pokémon, Reshiram. There, they encounter the enigmatic N, who possesses the ability to comprehend Pokémon speech. Soon, they find themselves entangled in a sinister Pokémon experiment orchestrated by the Plasma Gang. Under the influence of the dubious scientist Achroma, even Pikachu and Kibago turn against Satoshi and his friends. What are the true intentions of Ghetsis, the leader of the Plasma Gang, as he discloses their search for N? As the Rocket Gang trio reemerges in the Isshu Region, a clash with the Plasma Gang ensues. How will this confrontation unfold?