When the Mythical Pokemon Volcanion falls from the sky, a strange power links Ash to it. Volcanion is unable to flee, and Ash is pulled along as it pursues its goal. They arrive at a city of cogs and gears, where a crooked minister has stolen the ultimate invention: the 500-year-old Artificial Pokemon Magearna. The minister intends to seize control of the mechanical kingdom by utilizing Magearna's enigmatic power.