Deep in the mine during his first day on the job, Cork stumbles across a secret room that contains the remains of six murder victims. Five appear to be nearly half a century old, connected to what the media once dubbed "The Vanishings," a series of unsolved disappearances in the summer of 1964, when Cork's father was sheriff in Tamarack County. But the sixth has been dead less than a week. What's worse, two of the bodies, including the most recent victim, were killed using Cork's own gun, one handed down to him from his father. As Cork searches for answers, he must dig into his own past and that of his father, a well-respected man who harbored a ghastly truth. Time is running out, however. New threats surface, and unless Cork can unravel the tangled thread of clues quickly, more death is sure to come.