In a world inhabited by monsters, the city of Monstropolis is powered by energy from the screams of human children. At the Monsters, Incorporated factory, skilled monsters employed as "scarers" venture into the human world to scare children and harvest their screams, through doors that activate portals to children's bedroom closets. The field is considered dangerous, as human children are believed to be toxic. Energy production is falling because children are becoming less easily scared, and the company's CEO, Henry J. Waternoose III, is determined to find a solution to the problem.
