Frank Sinatra's performance as a cold-blooded assassin planning to kill the President of the United States is absolutely spellbinding in this classic thriller. While traveling to a vacation destination, the President's train is scheduled to pass through the normally serene small town of Suddenly. Sinatra and his gang of thugs take over a house that overlooks the Presidential train stop. They hold the terrified household members hostage as they await the ambush of the President. The suspense builds as this thriller rockets to its rapid-fire conclusion.

A tense, somewhat prescient drama in which Frank Sinatra plays a psychopathic triggerman hired to kill the United States President. On the way he and his two partners take over a widow's house, which is perfectly situated for an ambush. After Kennedy's assassination, the film was shelved and Sinatra tried to have the prints destroyed.