While adjusting to a new life in the suburban community of Aspen Ridge, a recently divorced mother of two receives mysterious letters instructing her and her teenage children to kill the people in their letters before they kill them. Paranoia and chaos ensues as the family attempts to rationally deal with an irrational situation.

Led by Major John Cafferty, a squad of US soldiers are sent on a mission,deep into the mountainous regions of Afghanistan with orders to extract a mysterious top secret package. Now they are back home in a military hospital because they have no memory of what happened to them, or even who they are. In time, they start to recall the strange events that occurred: apparitions that appeared, luring some of them to their deaths and readings of a powerful electromagnetic energy from a strange unearthly power source. But there is no time to dwell on the past, they need to face the bitter truth about how they ended up in Afghanistan to begin with and the betrayals that wiped out their minds and nearly destroyed their lives.

In the year 2961, the time is after humanity and nature has recovered the land. A hunter named Cygnus is called to rise above his duty. He provides for Last Arc, a once nomadic band of survivors in need of food and water that is now growing scarce. The answer must be found before a group of outlandish Heretics descend upon them. Cygnus must voyage across the treacherous landscape to defend his people. Sent by Nova, the matriarch of the band, she acts based on her vision for Cygnus to find a seed of hope. The future of Last Arc is for him to discover, Cygnus ventures into a hostile landscape in search of an answer for his people. On this journey of encountering many traps and dangers, Cygnus discovers what has been hunting him is his identity.