Society has collapsed, driven to madness after a great economic crash. Gangs roam the streets, taking any man, woman or child without a Mate for their own.

Martin is on the brink of despair, an asexual man who cannot keep a Mate. Facing a life he cannot bear, he heads to Spire Rock to end it. But when he reaches it, he encounters Anael, an angel sent to assess the world for destruction—and the first to accept Martin exactly as he is.

Teaming up with former gang concubine Sarah, they journey to the Tower of Elysius to end the world. But nothing is ever as simple as it seems, and some angels have plans of their own...