It seemed perfect - a new house, a new marriage, a child soon to be born. But when Sarah and Matt invite their friends to celebrate, the situation turns deadly as they enter a burned-out prison on a ghost hunt.

Ten thousand days ago, Comet 23 struck Earth with the magnitude of all the nuclear weapons in the world sending the planet into a deep freeze. Now, 27 years in the future, those who survived are locked in an epic battle of life or death.