The Earth is approaching the year 2200. It has been divided by four major powers who dwell in ceaseless war. Human pilots learn to drive massive mechanized soldiers called Goliaths as warmachines to tip the tides of battle in their favour. Porter Ryen is one of those pilots...but just in training for now. He takes classes orbiting Earth in a specialized academy for the Enia Federation. But one day he too will commit to this great war. And who is the mysterious Sigma? The ultimate weapon for victory or mankind's last mistake?