Colin MacLeod hunts for the man responsible for the death of his love. He chases the immortal Marcus Octavius across centuries as his quest threatens to take over his life and heart. In his quest, he meets a woman who reminds him of his slain beauty. But it's his final battle with Marcus that will decide not only his fate, but also the fate of everyone in the world.

Fifteen years have passed since the Martians’ first failed invasion of Earth. The year is 1914, and at the eve of World War I, Mars launches a sudden and more devastating second attack. A small defense force, A.R.E.S., is Earth’s only hope. The giant A.R.E.S. battle tripod GOLIATH is called up to war, and its young multinational crew must face their fears in their struggle to save Humanity from the alien invaders.