When Azriel — the fearsome and unfeeling Angel of Death — allows a human soul to slip through his fingers, God casts him down to Earth to find it. Azriel plans to use Jo LeCourt, the sister of the woman whose soul he failed to reap, to guide him. But he’s not counting on the sharp-witted and relentless Jo, who knows why he's there and will stop at nothing to stop him. As the two circle each other, Azriel discovers, for the first time in eternity, someone who really challenges and interests him. And Jo discovers, for the first time in her life, someone as reliable and exacting as she is. Neither of them are expecting to find a love that will change them forever.