Sean O'Brien couldn't remember the last time he made a promise and then broke it. He has every intention of keeping the promise he makes to his wife, Sherri, right before her death. O'Brien quits his career as a homicide investigator with the Miami PD and relocates to a remote section of Florida wilderness on the banks of the St. Johns River. He's restoring an old home and trying to rebuild his life when he discovers a young woman badly beaten and left for dead near the alligator-infested river. The injured woman whispers a cryptic message in O'Brien's ear, and he makes a promise to her. But when authorities drag their feer during the investigation, O'Briend finds the vow he made to his dead wife is about to conflict with the guarantee he made to the woman who was savagely attacked. Soon O'Brien is plunging deep into the dark world of human trafficking and sexual slavery. He is tossed into a deadly cat-and-mouse game where the only pledge he can make now is to stop an evil antagonist with a twisted, Godlike complex that's hellbent on sacrificing O'Briend to a greater cause.