Mike Rhoades, Reese Patterson, Josh Carter and his twin sister Jen are inseparable friends, but they each have a secret they cannot share with the others. All that changes, however, during a sailing trip down the Alaskan coast, when they are struck by a violent storm. After the winds clear, the friends find themselves lost in a nightmare landscape where clouds cover the Earth with eternal darkness; roaming gangs stalk the unending night seeking victims, and two militant factions battle to rule the devastated land by any means necessary. Mike, Reese, Josh and Jen are caught up in a fight for their lives, freedom, and their very humanity as they are drawn towards the inhuman being that has brought them into this apocalyptic future for its own enigmatic plans.