Two teen rival babysitters, Jenny and Lola, team up to hunt down one of their kids who accidentally ran away into the big city without any supervision.
The Parrs' baby Jack-Jack is thought to be normal, not having any super-powers like his parents or siblings. But when an outsider is hired to watch him, Jack-Jack shows his true potential.
Mike discovers that being the top-ranking laugh collector at Monsters, Inc. has its benefits – in particular, earning enough money to buy a six-wheel-drive car that's loaded with gadgets. That new-car smell doesn't last long enough, however, as Sulley jump-starts an ill-fated road test that teaches Mike the true meaning of buyer's remorse.
While streetworker Mickey romances Minnie, Mickey's nephews Morty and Ferdie take control of his steamroller and it's full speed ahead on a very destructive ride.