 During a mission to Austria, Sydney must protect the life of an American civilian, whom she unintentionally put in danger after she acquires information about a new mini-helicopter to be used as a weapon. Meanwhile, Jack travels to Madagascar to visit with an old friend, the arms dealer Sasha Korjev whom is the mastermind behind the assassin helicopter. Back in Los Angeles, Vaughn uncovers more disturbing secrets about his father of finding a diary with notes written years after his alleged "murder," which straightens his quest to know if his father is really alive.