The President of the United States is in Salamanca, Spain, about
to address the city in a public square. We see a plain-clothes cop, his
girlfriend with another man, a mother and child, an American tourist
with a video camera, and a Secret Service agent newly returned from
medical leave. Shots ring out and the President falls; a few minutes
later, we hear a distant explosion, then a bomb goes off in the square.
Those minutes are retold, several times, emphasizing different
characters' actions. Gradually, we discover who's behind the plot. Is
the Secret Service one step ahead, or have the President's adversaries
thought of everything?