The misdeeds of our ancestors are debts passed from generation to generation. They lurk, hidden in the shadows, waiting for the right time to be collected. For the residents of Harper Pass—their debt is due.

When a young autistic girl goes missing from a small Appalachian community, the residents of Harper Pass descend into chaos. Brooks Raker and his friends stumble across the police investigation, and as they dig deeper into the mysterious events, the boys realize the fate of their missing classmate pales in comparison with the evil lurking in the shadows of the quiet little town.

With four boys who believe something sinister is at work, and an ambitious reporter breathing down his neck, Detective Holt of the Harper Pass Police Department must confront his doubts and follow the evidence. A chain of disappearances and suspicious deaths, leads Holt to the doorstep of the mysterious and reclusive Professor Wadlow who may know exactly what has come to collect in Harper Pass. Can the detective and the boys work together to unravel the dark secrets of Harper Pass before those secrets devour them all?