Twelve-year-old puzzler Fog is riddled with guilt after his little brother, Roo, narrowly escapes death. Spurning risk and fearing adventure, Fog vows to shield Roo from danger. But his plan for a cozy stay-at-home Christmas is destroyed by the arrival of their reckless cousin and a sabotaged winter solstice ritual. Cracken Edge House awakens: an ancient evil that feeds on fear, and what was once Fog’s sanctuary becomes his worst nightmare. While the house roots around in his mind hunting for horror and as his grip on reality crumbles, Fog must face up to his past to save his brother from an eternity of nightmares.