The tranquility of a small town is marred only by sheriff Tod Shaw's unsuccessful courtship of widow Ellen Benson, a pacifist who can't abide guns and those who use them. But violence descends on Ellen's household willy-nilly when the U.S. President passes through town... and slightly psycho hired assassin John Baron finds the Benson home ideal for an ambush.
In the city of Suddenly, three gangsters trap the Benson family in their own house, on the top of a hill nearby the railroad station, with the intention of killing the president of the USA.