An executive clan gives the order to shoot Oichi out of an airlock on suspicion of being an insurgent. A sentient AI, a Medusa unit, rescues Oichi and begins to teach her the truth—the Executives are not who they think they are. Oichi, officially dead and now bonded to the Medusa unit, sees a chance to make a better life for everyone on board. As she sets things right one assassination at a time, Oichi becomes the very insurgent the Executives feared, and in the process uncovers the shocking truth behind the generation starship that is their home.