A young man sold into slavery swears revenge on the magician who killed his father. The story follows Kullervo, a doomed figure whose life is marked by misfortune and a burning desire for vengeance. He battles against the sorcerer Untamo, who murdered his father and enslaved him, navigating a world where his own innate magical abilities often work against him. The narrative framework is that of a mythic retelling, drawing from Finnish folklore.

The publication of J.R.R. Tolkien's 'Story of Kullervo' was met with significant interest from both Tolkien scholars and fantasy enthusiasts. Critics and readers alike have noted its importance as an early work by the author, showcasing his developing style and thematic interests. The text is recognized for its powerful, albeit dark, narrative and its deep roots in Finnish mythology. The scholarly introduction provides valuable insight into Tolkien's creative process and his engagement with folklore.