Ariadne is destined to become a goddess of the moon. She leads a lonely life, finding companionship only with her beloved, misshapen brother, Asterion, who must be held captive below the palace for his own safety.

Then a ship arrives bearing a tribute of slaves from Athens, and Ariadne meets Theseus, the son of the king of Athens. Ariadne finds herself drawn to the newcomer, and soon they form a friendship—one that could perhaps become something more.

But Theseus is doomed to die as an offering to the minotaur, that monster beneath the palace—unless he can kill the beast first. And that "monster" is Ariadne’s brother . . .