Mankind has fled to the Asteroid Belt to escape its bloating red sun. Humanity has evolved—it had to in order to survive...and now? Now there's a new threat. Human beings from a parallel universe have discovered how to create and use gateways—portals—between universes to travel. To make contact. To attack. To steal the dark energy which buffers one universe from another. This story is not about the future of one world, but rather the fate of an infinite number of worlds, all parallel to our own.