Halvor is such a lazy boy that his parents put him on a ship to work as a slave. He escapes and meets a lovely princess. He slays a three-headed troll keeping her prisoner and she falls in love with him. But Halvor doesn't appreciate the princess so she leaves him, planning to marry someone else. Finally, Halvor understands true love. He finds the princess; they marry, and live happily ever after. The story is based on a much-loved Norwegian fairy tale.