James P. Sullivan, or “Sulley” is known to be the top Scarer and has a rivalry with the chameleon-like monster Randall Boggs. One day Scarer George Sanderson accidentally brings a child’s sock into the factory, causing the Child Detection Agency (CDA) to cleanse him.
Roz the clerk constantly harasses Mike Wazowski for his paperwork and once he is on the verge of doing so, Sulley discovers that Randall left an activated door on the Scarefloor in an attempt of cheating which leads to a little girl entering the factory. Sulley places her in his bag after numerous failed attempts to putting her back.
Mike and his girlfriend Celia are on a date when Sulley tries to seek help, but chaos erupts when the little girl is seen at the restaurant. When the CDA is called, Sulley and Mike escape them and come to the realization that she is not toxic after all. Within the short period of time Sulley interacts with this girl, he becomes attached to her and decides to name her, “Boo.” Randall attempts to kidnap Boo, but actually mistakens Mike for her.
Randall reveals the “Scream Extractor,” a torture machine to extract children’s screams, but Sulley stops Randall before his experimentation and replaces him with Fungus, Randall’s assistant and reports him to Waternoose. They soon find out Waternoose is in allegiance with Randall and exiles both Mike and Sulley to the Himalayas. The Abominable Snowman tells them than can return through the village and they