The protagonists of the film are two brothers - Smaller and Big, Filomena and the dog Klops. Big has problems at school, so he decides to run away from home. His brother decides to find him.
Fram is in a German POW camp where brutal, cold-hearted Gestapo officers like Weber or Von Steinhagen terrorize and execute their Polish prisoners. One day Fram sees a way to escape the camp and he takes it, heading out to find his fellow resistance fighters.
Originally, Munk intended Eroica to be a triptych with Con bravura being the first part, but he ultimately gave up on this film, deeming it weaker artistically than the two counterparts. Con bravura is about conspiracy conflating the paths of a rather unconventional nun and an intrigued young man...