Adrien and Max, who have the highest levels at the Ultimate Robot Strike videogame, have to compete together in a major tournament. But as Marinette wants to spend some time with Adrien, she manages to take Max's place by beating him in a improvised challenge. Hawk Moth takes this opportunity to transform Max into Gamer. From then on, Gamer controls a large robot that wreaks havoc in Paris. Ladybug and Cat Noir will have to team up to fight a now very real robot.