Warren Gascoigne, the night watchman at the New York Museum of Natural History, is fired due to budget cuts, like many other employees. However, touched by his honesty during the dismissal interview, his boss offered him a new position, for which he had been looking for the ideal candidate for a very long time. He offers to be the guardian of his family mansion, located isolated in the woods further north in the state. Warren accepts, for at least a trial period, and moves there for the summer vacation with his two daughters. Quite quickly, they realize that they're not the only ones who live there, that there are also several "monsters" who live there in secret. However, understanding that there is nothing bad about them, just wanting to be at peace, the Gascoignes stay at their side, preparing to experience some adventures with these creatures who have just expanded the world of the little family of unlimited way !
