Can a monster choose to be good? That's the question facing Kyra Anastas. With snakes for hair and a gaze that turns men to stone, Kyra is a modern-day Medusa, making a living in Chicago as a hitwoman for hire. Feared and hated even by her fellow Mythic, she lives a solitary and bitter existence until a dying millionaire asks Kyra to protect her daughter from supernatural dangers. Eager to be more than just a dealer of death, Kyra takes the job. But the road to redemption will force Kyra to face all her demons— not just the monsters chasing them across the Windy City, but also the horrors that haunt her own evil past.