While awaiting his execution for murdering his son, Benjamin Poe confesses to his lawyer the true story behind his crime, a harrowing tale of a manipulating, soul-collecting demon named Crighton. 

Following Poe's death, Crighton continues his malevolent duties, until he's kidnapped by members of The Sovereign Sector. This group of scientists, notorious for experimenting on supernatural creatures, forces Crighton into a soulmate relationship with the very angel he was sent to capture for Lucifer. 

However, with secrets revealed and loyalties shifting, Crighton soon becomes the target of Lucifer's revenge, and his journey to redemption and freedom–or eternal enslavement–begins.