Groblins tend to keep themselves to themselves and very few people even know they exist. Grum has been thrown out of his home by his two brothers and has to prove that he is a worthy groblin before they will let him back in. As all groblins think that humans only exist in the worst kind of scary bed-time stories, Grum decides the best way to show he is brave is to go and find one and bring it back home. Along the way he comes across Burly, a mellow kind of bear, who takes him under his paw and together they go to town! They get into all kinds of trouble once they get there and end up being chased by a policeman and have to escape on skateboards. They meet Mike, an angel, and Max, a young human, and they discover cup cakes, ice cream, kittens and what humans are really all about. But will Grum manage to convince his brothers that he is a brave and worthy groblin?