A father leaves his children, Aidan and Mia, in the care of his new girlfriend, Grace, at their holiday home. When a blizzard traps them inside, terrifying events unfold that summon specters from Grace's dark past. With no way to leave and terror looming everywhere, they must find a way to survive the storm and come to terms with the ghosts that threaten to tear them apart. Little do they know, the evil forces are gearing up for an epic showdown with the boundaries of humanity and the afterlife.