May 1945. On the outskirts of Prague, ordinary people meet Soviet soldiers-liberators with tears of joy in their eyes. In the early days of the lull, someone sadly recalls a pre-war life; someone unexpectedly meets his love; someone is returning from enemy dungeons looking hopefully into the future; and someone, having moved from a tank into a Czech tram, warmly recalls his craft as a car driver... These days, all those who survived the Great War fire swear an oath to keep peace on Earth forever, honoring the memory of those who gave their lives for simple human happiness.
Film shows the struggle of the Czechoslovak armed forces against groups of Ukrainian Insurgent Army (UPA) under command Burlak, who tried to pass through the territory of Slovakia.
Grammar school teacher Bláha hurts himself in pursuit of a red lizard, and is lying unconscious in the lonely house of Santrucek family. The postman, who found Bláha's coat and hat in the water, announces to everyone in town that the professor has drowned. But, the venerable citizens are at that moment more interested in the theatre group with the beautiful guest actress Eva Gazdová. They demand a change of repertoire and manage to persuade the theatre manager to have the group play the musical comedy The Red Lizard instead of an established play.