When a fatal disease spreads over Bajor, threatening the entire planet with extinction, Captain Sisko must accept aid from an unexpected source: Ro Laren, Starfleet officer turned Maquis renegade. Major Kira and Ro reluctantly join forces to track the alien plague to its source -- even as the disease claims new victims on Deep Space Nine itself. Dr. Bashir struggles to find a cure, but the secret of the virulent invader may hide deep in the shadows of Dax's past.

Peter David is a prolific writer whose career, and continued popularity, spans more than twenty-five years. He has worked in every conceivable media-television, film, books (fiction, nonfiction, and audio), short stories, and comic books-and acquired followings in all of them.