Ash & co. have gone to the seaside to fish for some Pokémon. However, while doing so, Ash and Lana get separated from the group in a whirlpool and stumble upon the Legendary Pokémon, Kyogre. Kyogre is under attack from some Pokémon hunters and ends up poisoned. It is up to Ash and Lana to help the Kyogre and save it from the hunters. Will they succeed?

Having previously told Giovanni that they had captured Bewear, Team Rocket are asked to send it back to HQ. Worrying about the consequences for lying, Team Rocket try their best to capture the Bewear that has been looking after them, but things get worse when Matori and the Alolan Meowth come from HQ to take Bewear back personally. Will Team Rocket's lie be exposed?