The alien Simovs are proving to be far more numerous and powerful than the Galactics have let on. After attacks on human colonies and allies, and even Earth itself, a desperate search is on to find their home star system. A large allied fleet is being assembled to end the threat once and for all. In the meantime, two old friends and allies are working on separate projects to develop powerful new weapons. But will they perfect their work in time to make the darkness flee once and for all?