The film shows how the whole society changes in war conditions, i.e. human nature in all layers of society, to incredible proportions.

The film is picturing the faith of the old Serbian warrior Milisav Janjic, who fought against the German occupation in the Second World War as a member of the "Ravnogorski pokret". The storyline narrates his memories of the past and the war events in the spring of 1941 interwoven with the contemporary moments, the author features the attack of fascist Germany, the April war and the fall of the Kingdom of Yugoslavia, the misfortune placed upon the Serbian people, loss of freedom, birth of the freedom movement in Serbia and one Serbian soldier, who after 70 years of expatriation in America returns to his homeland.

Blue Train is Serbian atipic teenage comedy. Just before Tito's death a high school graduates in Belgrade live their normal life before the end of the school year. Spring is relaxed and they organize the election "Princess Of Spring" for the most beautiful girl in school. Vojislav is in love with Anica, friend from class. While his best friend, convinces him that the organization of the miss elections is the best way to win Anica's heart. Milena has crush in Vojislav, and she want to spoil his plan. After the death of professor of Marxism, in the school comes a new, very young and ambitious professor Božičković, a former pupil of the school. His charm and informal dress manages to win the sympathy of students, especially girls. Professor Božičković like Anica, and he shows that in front of the class. Anica and Vojislav do not appritiate that.