The guys arrive in Paris, 1793, and Doug is arrested by the Committee for Public Safety. Tony rescues him with the aid of a shopkeeper, who is a royalist and friend of Marie Antoinette. Meanwhile, Kirk has the Project send back an irradiated personal ring to the guys which they hope will act as a focal point to home in on. Doug and Tony get the ring, but then reveal themselves to a man who is a splitting image of General Kirk! This General, Querque, is with the Revolution and has them arrested, along with the shopkeeper. Querque has the ring and believes it is the evidence he needs to have Antoinette executed. Kirk brings his ancestor into the present and tries to convince him to change his mind. Querque escapes back into the Tunnel when they send the ring back, and tries to thwart Doug and Tony. They escape, and with forged passports get to Marie Antoinette and then help the Dauphin to escape. The shopkeeper and the Dauphin get on board a departing ship: Tony recognizes the Corsican g