General Fran (Ed Harris) of the U.S. Marine Corps was dissatisfied with the government's compensation and welfare for retired and dead soldiers and their families. He led his subordinates to smuggle the U.S. military's latest biological weapon - VX gas bombs - to Rock Island, hijacked 81 tourists who were sightseeing on the island, and took control of the island. He threatened the U.S. government to pay a ransom of 100 million yuan within 48 hours, otherwise he would kill the hostages and attack San Francisco with gas bombs. Rock Island was once the most heavily guarded prison in the United States, easy to defend and difficult to attack. The U.S. government accidentally discovered from the archives that former British agent Mason (Sean Connery) had successfully escaped from the prison, so they invited Mason and asked him to lead the special forces to capture this "Devil's Island" within 30 hours...