Pat Nolan, an American, is summoned to Paris to claim the body of his estranged daughter Megan who has committed suicide. The body, however, is not Megan's and it becomes instantly clear to Pat that Megan staged this, that she is in serious trouble, and that she is calling to him for help. This sends Pat on an odyssey with Catherine Laurence, a beautiful but tormented Paris detective, that stretches across France and into the Czech Republic and that makes him the target of both the French police and a band of international terrorists.