Everyone knows the rules. When you die, you get a key. And, after you walk through Purgatory, up to the Pearly Gates and place it into the lock, you'll go up to Heaven - or fall, burning into Hell. But over time a third choice has appeared - to stay in Purgatory - and across millennia the city of Crowtown was born. In a city like no other, filled with both the best and worst of humanity, Detective Gravel works the city beat - but when a stranger arrives, Cain, son of Abel, the creator of murder and the only man here who hasn't died, it can only mean trouble - trouble that Gravel needs to learn about in an interrogation. But what happens when the interrogator becomes the interrogated?