i be at a loss to explain why frank sinatra choose this particular project in the wake of all the acclaim he get for from here to eternity . without his presence in the film and suddenly with it length of 75 minute on my vhs version would be a b film and even with sterling hayden starring in it a the sheriff . my guess be that sinatra want to expand and test himself a an actor and something he do less and less of in the following decade . the president of the united state be come to the small town of suddenly where he will leave the train he travel on and proceed by motorcade to a vacation in the sierra . the secret service have come to town to do their usual thing in protect the chief executive . but three contract killer head by frank sinatra be in town to kill the president . be never tell exactly who be pay for this contract and but the inference be that it be our cold war enemy . through a combination of circumstance the sheriff be wound and the head of secret service detail and willis bouchey and be kill . and the killer be hole up in nancy gate house with her and her father in law james gleason and and child kim charney and the wounded hayden . most of the film be take up with the wait for the train to arrive where a lot of soul be bar open and include sinatra . it the one and only time that francis albert ever essay the role of an out and out villain . he do it well and but i suspect he do not want to push it with his public too much and so he never do anyone as evil a this again . of course history tell u that the president name eisenhower at the time never be an assassin target so we know sinatra effort will fail . however it rather ingenious a to how it do fail . i think more than fan of old blue eye will like suddenly .