As a corrupt cop, he thought he knew evil.

After a botched raid, narcotics detective Rick Mercy is being hunted by fellow cops, the drug dealers, and the torture cult he and his partner stumbled upon.

His partner did not survive the encounter. Rick did, but with a gash across his chest from a ceremonial weapon, a human bone. And now, since getting slashed, a dark, intoxicating hunger is creeping into his mind. Mercy has to evade capture long enough to figure out what the hell is going on.

As the city turns against him and his only ally is a lover who inexplicably genuinely cares for him, he has to uncover who and what this torture cult is and what his emerging bloodlust means...

Nothing is worse than willful evil.