While private investigator Cal Weaver investigates the mass poisoning in Promise Falls, New York, detective Barry Duckworth uncovers a connection between three recent murders and other crimes in the area.

After his wife's death and the collapse of his business, David Harwood returns to his childhood home with his son, where he uncovers a family secret that results in murder and other strange occurrences, including the ritual slaughtering of animals.

When a mutilated corpse turns up at his father's lakeside fishing camp, supposedly the victim of a vicious bear attack, journalist and family man Zack Walker begins to suspect something far more sinister and finds himself taking on a deadly predator with a host of terrifying weapons with a fanatical thirst for mayhem.