Wolfgang Doeblin, son of the famous novelist Alfred Döblin, was a brilliant mathematician. This movie sketches the tragic fate of a young German refugee who died as a French soldier.

Wolfgang Doeblin, born 1915 in Berlin, was one of four sons of the author of "Berlin Alexanderplatz", and notorious anti-nazi. After the Döblin family escaped to France in 1933, Wolfgang studied at the Sorbonne and became the youngest mathematician PhD in France. He was considered one of the most talented probability theorist of his generation.

A French citizen since 1936, he was called up for military service by the French army in 1938 and killed himself in 1940. In the years 1939/40, Wolfgang Döblin wrote extensively about "random movements" in probability theory. His latest manuscripts were unreleased until the year 2000 and, once published, became a scientific sensation.