In a bleak, futuristic world haunted by the shadow of an ancient alien conquest, humanity teeters on the brink of extinction. Centuries ago, Earth was overtaken by the Chronos, a ruthless and intelligent alien species known as the Chromaniums, and their monstrous allies, the Terradons - parasitic war-beasts that infect and mutate humans into living weapons. Now, in the future, humanity's final hope lies hidden within the mind of Dr. Glenn Overton, a brilliant but unstable scientist who holds the secret key to humanity's survival - a cure that could stop the alien infection and turn the tide of the war.