Following the events of “Guardians of the Galaxy Vol. 1,” Baby Groot is finally ready to try taking his first steps out of his pot—only to learn you have to walk before you can run.

A group of French soldiers, including the patrician Captain de Boeldieu and the working-class Lieutenant Maréchal, grapple with their own class differences after being captured and held in a World War I German prison camp. When the men are transferred to a high-security fortress, they must concoct a plan to escape beneath the watchful eye of aristocratic German officer von Rauffenstein, who has formed an unexpected bond with de Boeldieu.

T.J. and The Recess Gang are kidnapped by the Third Street School's kindergartners, who are in turn being bullied by a new kid in their class.