Having met and outsmarted the smiling man in Dead Voices but fearful of when he'll come again, Ollie, Brian, and Coco are anxiously searching for a way to defeat him once and for all. By staying together and avoiding remote places, they've steered clear of him so far but their constant worry and stress is taking a toll on their lives and friendship. So when Ollie's dad and Coco's mom plan a "fun" boat trip on Lake Champlain, the three are apprehensive to say the least. They haven't had the best of luck on their recent trips and even worse their frenemy Phil is on the boat as well. But when a lake monster destroys their boat, they end up shipwrecked on a deserted island. This isn't just any island though. It's hidden from the outside world in a fog and unless everyone works together to find a way to escape, they won't survive long.
