Some debts are paid in blood. Others in love. Syneca Black should be dead. But with her last breath, the Phoenix witch makes a desperate bargain with a mysterious stranger for a price she still doesn't understand. She wakes in the Underworld alive, bound, and hunted. To repay the bargain that spared her life, Syneca must find a missing dragon before her debt comes due. Only Silas stands between her and the demon princes who want the stolen fire in her veins. The more she lets herself trust the man who carried her into the Underworld, the harder it gets to tell where her distrust of him ends and everything else begins. She isn't the only one running out of time. Lucette Varrow answers to the moon now, and whatever she becomes when it rises, she doesn't remember it. The only thing that ever breaks through is a dragon she shouldn't recognize, and can't stop needing. Two women descended into different kinds of darkness. Only one may find her way back.