After a months-long bender attempting to rid himself of memories from his past, Orion signs his soul away to the demon mafia. For years he fights against his contractual fate as well as his manipulative and possessive boss - a prince of hell - Mr. Mon. Years later, now working for a new boss, something goes terribly wrong and Orion is sent to negotiate a deal with none other than Mr. Mon. The powers of their original contract still linger and Orion finds himself engaged in yet another agreement with the prince. That night, he heads to a bar and ends up in a one-night-stand with a charming demon named Athan. As if waking up as property of Mr. Mon's once again isn't bad enough, he soon discovers that Athan also works for the prince. When they are assigned to work together, Orion must face his painful past to get the job done. But in a world run by demons, it's hard to know who to trust.