Callie Delgado always puts family first, and unfortunately, her brother knows it. She'd spent all her savings, lost her job, and shed a lot of tears trying to keep him out of trouble, but now he was in deep trouble, and his debt was pinned on Callie. She was given a choice: do some dirty work for the mafia, or her brother would be sent to her in pieces. Soul rental is an important business for the religious population of Gem City. Those who want to commit an immoral or even illegal act can borrow someone's soul for a certain price and sin without consequences. To save her brother, Callie must get a borrowed soul, but she does not have the money for this. The nefarious Soul Whisperer is willing to barter, but if Callie accepts his offer, she will be forced into a dangerous world of magic for which she is unprepared. With the help of the reserved but undeniably attractive Derek (whose loyalty to the Soul Whisperer weakens as his affection for Callie) she will have to walk on a knife's edge, try not to anger the bad guys, and all the while trying to decide what her loyalty to her family is really worth. Losing her brother is not an option. Lose your soul? Perhaps.