Death stalks the living. Seven writers have fled to Mirror House, a picturesque mansion by the sea. Each member of the group is running from a terrible premonition of their own death on July 24. What they don’t know is they were, in fact, prophesizing the end of the world, for on that very day, billions will die from a relentless heatwave triggered by global warming.

Yet, some hope remains. The mansion is unnaturally cold, providing the group a buffer against the killer heat. Is it possible they accidentally stumbled onto the perfect sanctuary? They soon learn their good fortune is nothing more than an illusion, for an unseen evil lurks within the mysterious subbasement, and it will soon rise to claim its first victim.