Aria Knight has an unusual set of skills: she will hold back the hounds of Hell so that you can fly toward the Pearly Gates, and she will wipe your slate clean so you don't become karma's bitch...for a price. A sin eater has to make a living in today's world somehow. But when she's called in the dead of night to perform her rite for a recluse billionaire, she stumbles upon a murder scene, and the evidence points to her. In an attempt to clear her name and uncover the true culprit, Aria is forced to team up with a private investigator who's possessed by three spirits and a handsome wizard who would rather see all sin eaters like Aria go extinct. Aria knows her job is never easy, but now, it's become downright deadly.