Once upon a time, in the haunted city of Derry (site of It and Insomnia), four young boys did a brave thing; something that changed them in ways they hardly understand. A quarter-century later, the boys are men who still get together once a year, to go hunting in the north woods of Maine. But this time a man comes stumbling into their camp, lost, disoriented and muttering about lights in the sky. Before long, these old friends will be plunged into the most remarkable events of their lives and a terrible struggle with a creature from another world. Their only chance of survival is locked in their past and in the boy they once rescued as a child.