The USC Westbound carries the last remaining survivors of the human race. After nearly twenty years searching for a new home or signs of intelligent life, an incurable virus spreads on the ship and threatens to kill mankind once and for all. In a desperate attempt to save the human species, two immune teenagers are put into cryostasis and sent into deep space. When they finally awaken, the sins of mankind's past haunt them and threaten, one way or another, to kill them both and forever close the chapter on our existence.

When Judy and Samantha Stanton's father is murdered, Samantha loses the only man she's ever loved and Judy is determined to prove herself once and for all by bringing his killer to justice. Bound by a mutual determination to avenge their father's death, the sister's set off along the California Trail and face brutal weather, outlaws, hunger, and injuries. Sam, accustomed to an easy life under the protective wing of her wealthy father, must lean on her hard-nosed and pragmatic sister, who grows increasingly irritated over her dependency. Along the way, they befriend a mysterious physician from...