Hanna en de Monstervriendjes

Can a girl of only 4 years old be able to turn an entire city inhabited by monsters upside down? Monsters live in a hidden world, far away from the people they fear. The monsters are so different and have such different interests that they have some difficulties. But Nessy, Yetti, Shewolf and Coco have created a kind of family. But one night, a 4-year-old girl named Hanna discovers Coco in her room and follows him to Monsterville. But when she arrives, they panic: if she is not brought back in time, she could be stuck in Monsterville forever and people will come looking for her. They are afraid of her, but manage to accept her differences. But when the Cyclops and the Gargoyle, their rivals, kidnap the girl, they will have to put their differences aside to save Hanna from a dark plan.