For a thousand years the Helions have predicted the return of the Biomechs and their hordes, and for a thousand years they have done little to prepare. The Prophecy of Fire has spread like a disease through every world, infusing fear to civilian and soldier alike. The Khreenk and Byotai are no strangers to this, but will they choose to ally in the coming fight, or will they turn back to old rivalries and fears? The attack on Eos proved the Biomechs had returned, but it is their relentless advance into the heart of the Helios system that marks the first stage of the war. Comet C34 houses innumerable surprises, not least being the mighty invasion Arks hidden deep inside its core. Every planet in the system from the capital world of Helios Prime through to the ancient ruined world of Spascia is now under threat of occupation, and the Helions will be unable to hold them back alone.