Poland in the politically turbulent late 1970s and a young man, Witek, is running to catch a train. From this banal event, director Krzysztof Kieslowski imagines three possible outcomes. In the first scenario, Witek catches the train on which he meets some hard- line communists and joins the party. In the second, as Witek runs for the train, his path is blocked by a ticket inspector - the ensuing struggle leads to his arrest and subsequent involvement in the political underground. In the final scenario, Witek misses the train and he returns to the medical studies that he intended to abandon. He falls in love with a female student, gets married and lives a quiet life as a doctor, showing little interest in politics.