Severely damaged after their escape from Terrana, the crew of Oriana limps home with three new passengers in tow. While scouring the forest to replenish their dwindling food supply, two crewmembers fall victim to a mysterious illness. First mate Tray Matthews, who has always considered himself a glorified cook, is forced into the role of captain, medic, engineer, and security chief as more of the crew fall ill. Desperately in need of a doctor and a cure, he seeks out the Trade Circle, a common ground where nomadic tribes traveling through the area meet for peaceful trade. When competing tribes arrive at the Trade Circle, each eager to be the first to ally with Tray and gain access to Oriana's advanced technology, the crew find themselves in an unexpected fight for their ship, their freedom, and their lives.