Humanity has spread to the stars using Fold Drives, a technology that allows travel from the Oort cloud of one solar system to the Oort cloud of another in an instant. The dozen colonized solar systems that make up humanity's expansion are in a state of cautious tension. Since the end of the second inter-solar war five hundred years ago humanity has descended into an unending cold war.
ASI, one of two mega-corporations so large it owns an entire solar systems, is sending out its newest batch of employees to locate the Black Fleet, an enigmatic armada of Voiders - humans born and raised in space. More rests on these employees finding this new market than anyone could expect.
Within the Black Fleet itself a freighter captain tries to find a missing friend. This leads her crew along a trail that takes them to different solar systems as they poke the edges of a conspiracy that could change not only themselves but the entirety of the Black Fleet if allowed to achieve its purpose.