Medusa is the sole mortal in a family of gods. Growing up with her Gorgon sisters, she begins to realize that she is the only one who experiences change, the only one who can be hurt.

When Poseidon commits an unforgiveable act against Medusa in the temple of Athene, the goddess takes her revenge where she can: on his victim. Medusa is changed forever - writhing snakes for hair and her gaze now turns any living creature to stone. She can look at nothing without destroying it.

Desperate to protect her beloved sisters, Medusa condemns herself to a life of shadows. Until Perseus embarks upon a quest to fetch the head of a Gorgon . . .