In a fishing tournament in Lumiose City, Clemont and Bonnie meet the Pokémon Connoisseur Cilan. Cilan tells them he’d like to go to the Prism Tower, so Clemont and Bonnie decide to guide him. But when Cilan requests that they travel via the subway, an accident occurs. A driverless subway train starts moving while Bonnie is on board. What will Clemont and Cilan do?