Niki Slobodian knows loss. She knows tragedy. But she has never known this kind of pain. After the war the Archangel Michael waged on her city, Niki is dealing with the loss of her loved ones. And the haunting suspicion that everything was her fault. As well as her new duty to help all the lost souls cross over.But when Niki's only living friend, Bobby Gage, comes up missing, she has to take action. She enlists the help of Lucifer and together they learn that Bobby has been tracking Kane, the man who murdered his family, and is now killing again, leaving a trail of mutilated corpses all across the globe. And with the power to disappear unnoticed, it seems an impossible feat to find him and stop him.But Niki is familiar with the impossible. And she would do anything to help her only living friend. Anything.