Emma Monroe is not your average FBI agent. She’s a Siren and her job finding missing people is a way of trying to atone for her past sins. She needs the forgiveness of the goddess Demeter and hopes that at some point, all her good work will help balance the scales in her favour. She has been waiting a few thousand years for her exile to be revoked but redemption could be one case away. Her new partner, werewolf Zack Armstrong, threatens to upset the status quo as they try to locate some missing women.