In the world behind our closet doors monsters are lurking to collect the energy of our screams. At Monsters, Inc., James P. Sullivan (Sully) is the top scream-generator with his partner Mike Wazowski. But, there's still a scream shortage in the monster world. One night, Sully and Mike accidentally let a human girl through her closet door into Monstropolis, and pandemonium ensues. Sully and Mike work to return the little girl to her own world, while...