Emil er10 år og bor alene med sin mor. Hun er ofte ked af det og ligger i sengen, og Emil er sikker på, at det skyldes det uhyre, som gemmer sig i deres lejlighed. Han klarer sig dårligt i skolen og må gå 3. klasse om. Han er ensom og vred og mobber andre, især Jack. Men han er også meget stærk og god til fodbold, og det hjælper ham til at blive gladere og få nye venner. In English: Emil is 10 years old and lives alone with his mother. She is often upset and stays in bed, and Emil is sure that it is due to the monster that is hiding in their apartment. He does poorly in school and has to go to 3rd grade again. He is lonely and angry and bullies others, especially Jack. But he is also very strong and good at football and that helps him to be happier and make new friends.