This film is based on a classic novel, apparently - which no doubt goes into more depth regarding each character.
The end notes make clear this is about the scouting movement in Poland and how they resisted the Nazis then the Stalinists. If so, the actors cast are rather too old - though I'd need to check the source novel and history before asserting that really,. Surely scouts are 11-16 or so? Not 18/19/20? Anyhoo...
Film-makers have to make choices when adaptations from novels are done, so a main character must be chosen and certain aspects highlighted but others dropped. This is possibly why much of this film is fragmentary and sags towards the end. Novels do not have to have the simple 3 act structure of screenplays.
I liked the high production values of this, esp re the music used - which is in contrast to some other Polish movies set in WWII and Warsaw. The quality of the novel shines through, though I suspect we only glimpse its poetry.
One very annoying aspect of this film - the overweight character is always eating, because that is what anyone slightly overweight does, right? This is pure cartoon character stuff and cringe-worthy.
But all in all a fascinating film that made me want to find out more. 4 stars.