“The Windigo has a heart of ice.” The legends of an ancient cannibal demon might have been enthralling, but they were folklore. To Jo and Becca, investigating reports of a Windigo is a lively scholarly exercise, and for Grady and Elena, it means a weekend at an idyllic mountain retreat. Only Pat and Maggie can draw on their Native roots to recognize a monster out of Algonquin myth, but only if they unlock the mystery of their shared past. Throw six volatile personalities into a snowbound cabin, beset by a blizzard, and stalked by a monster, and there’s no assurance they’ll survive the night with their sanity intact—or their lives.