The film is set in class 12A at Marie Curie School, Ho Chi Minh City, in a group of students entering their senior year.

Hue battlefield in the 40s, when the boys aged 9 and 10, who were supposed to go to school, engaged in the war. Their innocence and patriotism had made many touching stories and characters that would stand the test of time.

In post-war Vietnam, a talented piano student and doctor in training begin a doomed love affair.