A renegade general and his crack team of mercenaries take over the abandoned fortress prison of Alcatraz and threaten San Francisco with toxic nerve-gas rockets to extort a massive ransom. To break their stranglehold on the city, the FBI sends in a chemical weapons expert and a jailed SAS veteran, chosen because he is the only man to have ever escaped from the infamous penitentiary. Action thriller, with Sean Connery, Nicolas Cage and Ed Harris.