Expert conman Joe Thanks teams up with half-breed Bill and naive Lucy to steal $300,000 from the Indian-hating Major Cabot. Their elaborate plan is full of disguises, double-crosses, and chases, but Joe always seems to know what he's doing.

Ash, Pikachu, and their friends come to a desert city by the sea. Here they meet the Mythical Pokémon Hoopa, which has the ability to summon things—including people and Pokémon—through its magic rings. After a scary incident, they learn of a story about a brave hero who stopped the rampage of a terrifying Pokémon long ago. Now, the threat that has been bottled up for years is in danger of breaking loose again.