 His days as an intelligence agent behind him, former CIA analyst Jack Ryan has traveled to London to vacation with his wife and child. Meeting his family outside Buckingham Palace, Ryan is caught in the middle of a terrorist attack on Lord Holmes, a member of the Royal Family. Ryan helps to thwart Holmes  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.