When out-of-shape IT technician Roen woke up and started hearing voices in his head, he naturally assumed he was losing it. He wasn't. He now has a passenger in his brain - an ancient alien life-form called Tao, whose race crash-landed on Earth before the first fish crawled out of the oceans. Now split into two opposing factions - the peace-loving, but under-represented Prophus, and the savage, powerful Genjix - the aliens have been in a state of civil war for centuries. Both sides are searching for a way off-planet, and the Genjix will sacrifice the entire human race, if that's what it takes.