When someone steals Diana's cat, a former lab animal rescued from death's door, she calls on one of the most dangerous beings in the universe for help. Cutting a deal with the devil isn't the smartest move, but there's no way in hell she'll abandon Mr. Flooferson the Magnificent to his fate.

Teaming up with the son of a demon, an angel, and one hell of a woman might push Diana to the limits of her courage and sanity. Unless she wants to sell her soul to the devil, she must cope with her new partner, make the most of a bad situation, find out who stole her cat and why.

What she learns will forever change humanity—and lead to a battle destined to forever change the heavens and the devil's many hells.