Hachli Sveinsson always loved to hear stories about his ancestor Swein, who led the ancient warriors in a decisive battle with the trolls - monsters that devour people. After this battle, the trolls retreated to the mountains, and the people living in the valley sighed calmly, although they were afraid to go beyond the line of mounds guarding their lands. However, Hallie does not really believe in the existence of trolls. He himself, I must say, is not at all like the ancient heroes: he is not too beautiful, and he did not come out of height. But he is a master at all kinds of jokes and pranks, and one of these jokes cost him dearly, causing a chain of events that radically changed the fate of the young man and his relatives...