Thor, the God of Thunder, must retrieve his stolen hammer, Mjolnir, from the Frost Giant Thrym. The giant has promised to return the hammer only if he can marry Thor's sister, Freya. Thor, disguised as Freya, must journey to Jotunheim, the land of the giants, to confront Thrym and reclaim his powerful weapon, facing the challenge of maintaining his disguise among the wary giants.

This retelling of the Norse myth is likely to be appreciated for its accessible presentation of a classic story. The narrative's focus on Thor's quest and the clever deception involved in retrieving Mjolnir provides a clear and engaging plot. The book's adaptation of ancient mythology for a younger audience suggests it serves as an enjoyable introduction to Norse legends. Its structure as a picture book implies a visual storytelling approach that complements the epic tale.