His heart isn't the only thing Christian might end up losing when he falls for Joan.
Being an Enforcer isn't helping Christian Vosberg hold on to his compassion for the mortals he's supposed to protect. He's going through the motions of living and obeying his orders.
Joan Fisher helps the street people of New York City to give them the same chance that she received all those years ago. She understands how compassion can give someone the strength to hang on until things could get better.
When Christian meets Joan, he doesn't know that she's the one who will bring him back from the brink. All he knows is that she is beautiful and caring. He begins to find his own heart again.
But when a debt Joan owes comes due, Christian finds himself in danger of losing more than just his heart.