Before the Commonwealth existed, there was an expanding, multi-galaxy civilization referred to by its descendants/survivors simply as "First Civ". Due to the combined effects of a too-aggressive policy of expansion, civil unrest, the inequality and abuse of the classes, and the categorizing of augmented humans as a slave class, First Civ disintegrated. The period of darkness and barbarism that followed is referred to as the Downfall. Various groups of people fled First Civ as they became endangered or more powerful people tried to have them classified as mutants or non-humans, and either sterilized or made them into slaves. Among them were the Khybors, the ancestors of the Leapers. Some groups of people managed to get hold of ships and flee to distant galaxies. Using sleeper ships, they could spend centuries in travel and no one would age. This caused problems later, when different waves of refugees landed on the same planet, and the newcomers came into conflict with those who'd been there for centuries. Niall Encardi is ready to graduate after long, intensive years of medical training and go home to the colony world of Sorendaal. His life-long dream has been to become a healer and help the people his uncle, the governor, leads. The revolutionaries who overthrow the current government of the Central Allied Worlds have other plans. When the homeworlds of Niall and his classmates don't immediately give support and approval to the revolutionaries, the medical students are labeled enemies of the state and transported to prison. Despite every effort to stay focused on his first calling, healing and medicine, Niall becomes a leader, first on a prison planet, then on the prison space station known as the Abyss. Every time the government changes hands, he and his friends and then his allies in the prison society are labeled conspirators and sympathizers and condemned to yet more imprisonment. By the time the Abyss is attacked, Niall and his people have become a force to be reckoned with in their goal of freedom...even if it means turning pirate, like the falsely imprisoned nobleman who once sailed the ancient seas, on a ship called the Vendetta.