After mistaking him for a masked killer, Jonathan fatally stabbed his sister's boyfriend on Halloween. One year later to the day, the siblings find themselves fighting for their lives against a very familiar masked murderer.
Sydney Bristow, an agent who has been tricked to believe she is working for the U.S. government, is actually working for a criminal organization named the Alliance of Twelve. Upon learning this, Sydney becomes a double agent for the real CIA.
Ed Deline is a strict ex-CIA officer who went from being Head of Security to becoming President of Operations of the Montecito, whose job is to run the day-to-day operations of the casino. Following his departure, former Marine Danny McCoy, Ed's former protégé, becomes the Montecito's new President of Operations.
