La hija menor de Mackenzie Allen Phillips, Missy, desaparece durante unas vacaciones familiares. En el proceso de su busqueda se encuentran evidencias de que pudo haber sido brutalmente asesinada en una cabana abandonada en lo mas profundo de los bosques de Oregon. Transcurridos cuatro anos, Mack recibe una extrana carta, firmada por Dios, que la conmina a reunirse con el en el lugar donde la nina murio. A pesar de lo aparentemente absurdo de la situaticion, decide acudir a la cita y sumergirse de nuevo en su mas oscura pesadilla; lo que alli sucede camibara su vida siempre.

Mackenzie Allen Phillips's youngest daughter, Missy, has been abducted during a family vacation. Evidence that she may have been brutally murdered is found in an abandoned shack deep in the Oregon wilderness. Four years later, in the midst of his great sadness, Mack receives a suspicious note—apparently from God—inviting him back to that shack for a weekend.
Against his better judgment, he arrives at the shack on a wintry afternoon and walks back into his darkest nightmare. What he finds there will change his life forever.