A secret kingdom of trolls, guarding their legendary gold, lies in the mysterious shadows of Troll Fell. It is to this eerie and dangerous place that Peer Ulfsson must go after his father's sudden death, to live with his greedy, bad-tempered uncles, Baldur and Grim.

When Peer discovers his uncles' terrible plan to capture the gold by selling human children to the trolls, he has to bury his fears and find a way to stop them. He has only his bravery, his wit, and two new allies -- a daring girl looking for adventure and a mischievous house spirit looking for a good meal. Their story will become part of the lore of this extraordinary land by the sea.