Jahn flashes back to his college days and his love for Markéta, a devout believer in communism. In an attempt to make the humorless Markéta lighten up, Jahn sends her a postcard reading "Optimism is the opium of mankind. A 'healthy spirit' stinks of stupidity. Long live Trotsky! Yours, Ludvík". Markéta turns the postcard over to the Party, however, and Jahn is brought before a Party hearing to answer for his words. Pavel, a friend who had pledged to help him, calls in the meeting for Jahn's expulsion from the college and the Communist Party, and Markéta joins the vote against him.
