In other worlds live such a group of monsters, they look funny, but they must pretend to be hideous. Because, in the middle of the night, they will quietly appear in the child's wardrobe to scare the baby who has just fallen asleep. Everything, just because they are employees of the Monster Power Company, and the screams of the children are all the energy generated by the Monster Kingdom. Monsters are afraid of children, thinking that everything about children will cause harm to the monsters, but they must make the children scream. In the kingdom of monsters, they are all heroes for the benefit of the whole people.
Sallyis the most outstanding employee of Monster Company. His performance is always leading, and he scares countless children. He and his partner Big Eyed Mikebyvery popular. Once accidentally, Sally accidentally brought a two-year-old girl, Abuback to the monster world, causing a great panic. The naughty and cute Abu turned the scared people of these terrible monsters on their backs. While the police are pursuing Abu with all their strength, the villain Randallalso plans to use Abu to carry out his evil plan to reform the factory.
On the other hand, in the process of getting along with Abu, the monster Mao gradually developed an inexplicable affection for her, and was even exiled to the desolate land of the human world. But nothing can resist Mao Monster's belief in saving the girl. For Abu, Mao Monster embarks on an arduous journey.
