Darren Dalton

Hundreds of massive intergalactic robots appear in all of the world's major capitals with an ultimatum: Prove the value of human civilization or be destroyed.

Two years after the Martian invasion, George Herbert's worst fears are realized: The Aliens have returned. As a second wave of Martian walkers lay waste to what's left of Earth, an alliance of military forces prepares a daring attack on the Red Planet itself. Once again, the future of mankind hangs in the balance.

Hoyce and Bess Guthrie are long married Montana ranchers who come to a major crossroads in their lives. An oil company has offered to buy them out and Hoyce wants to sell while Bess hopes to keep the land in the family for future generations.