Just days away from execution, Abb Grimes reaches out to ex-cop Jack Carpenter with a surprising request. Despite the fact that Carpenter was instrumental in putting the notorious serial killer behind bars, the doomed convict now wants Carpenter to find his missing grandson. The cops are convinced that the boy's father–Abb's troubled son, Jed–is behind his disappearance, but Jack's not so sure. And yet, when the evidence in a gruesome murder leads straight to Jed, the question must be asked: Have the unspeakable sins of his father taken root in this disturbed young man? Searching through an underworld of predators, assembling the jagged pieces of a depraved puzzle, Jack Carpenter is desperate to catch a ruthless killer before he strikes again.