It s time to go to the sleep but, Juan Gorilla doesn`t want to do it. He is afraid. Gorilla Mom leaves him in his bed, but just as she closed the door and turned off the light, monsters begin to appear. Juan Gorilla screams desperate and their parents alarmed, come into the room. The room is reviewed carefully but, they find nothing. Mom and Dad say goodbye again, but this time they never return in all night. Our Juan is alone with the monsters, so he has to solve the problem by himself; using his imagination and creativity, he will find the power to defeat the monsters.