Robert Renwick of NATO'S undercover counterterrorist organization is reunited briefly in Amsterdam with Nina O'Connell, whom he has not seen for years. Before they can become reacquainted, Nina is off on an expense-free tour with a group of students who, Renwick suspects, are not what they seem. Nina, the daughter of a U.S. government official, becomes the pawn of the tourists' leader, a veteran terrorist.
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