When a terrorist group known as Black September initiates a plot to carry out a large-scale attack in the United States, an Israeli commando and the FBI join forces to identify the target and conspirators, as well as thwart the plan from coming to fruition. The film, directed by John Frankenheimer and written by Thomas Harris, Ernest Lehman, and Kenneth Ross, features a star-studded cast including Robert Shaw, Bruce Dern, and Marthe Keller.