Milo decides to reinvent himself as the cool new 'cat' in town at an annual 'Cats Only' festival. Unfortunately, attempting to be the 'coolest cat at the carnival' brings unexpected trouble.
Milo's urge to act more instinctively whilst trying to stop a heist at the museum, leads to the Guardians being identified as criminals. Jack unknowingly joins the minions and the whole city faces a super-charged threat.