His days as an intelligence agent behind him, former CIA analyst Jack Ryan (Harrison Ford) has traveled to London to vacation with his wife and daughter. Meeting his family outside of Buckingham Palace, Ryan is caught in the middle of a terrorist attack on a member of the Royal Family. Ryan helps to thwart the assailants and becomes a local hero, but Ryan's courageous act marks him as a target in the sights of the terrorist whose brother he killed. Now Ryan must return to action for the most vital assignment of his life: to save his family.