On his way to becoming a Pokémon Master, Ash Ketchum and his companions continue on with their journey. But suddenly, a large mass enveloped in white smoke descends from the sky and lands in front of the group. Surrounding the area with white smoke, is a powerful Mythical Pokémon called Volcanion. Coming from the remote Nebel Plateau, Volcanion lives with Pokémon harmed by humans, and thus holds great distaste towards them. Ignoring the concerns of Ash and his friends, Volcanion immediately tries to leave, but a mysterious force binds Volcanion and Ash to each other. Finding themselves unable to separate, Ash is dragged along as Volcanion continues on its mission. In a city where large cogs and gears run continuously, a corrupt councillor of the Azoth Kingdom has obtained the ultimate invention: the Artificial Pokémon Magearna. Magearna was created 500 years ago and since lost, until the councillor found and kidnapped it from the Nebel Plateau. The councillor plans to use Magearna’s mysterious power of its “Soul Heart” to take control of the mechanical kingdom. Now forced to work with each other, Ash and Volcanion must save Magearna from the corrupt councillor before he takes control of the Azoth Kingdom.