This is the last film of the "Masaki Kobayashi Against the System series". Skipped the third film, "Black River", as I saw it before already. The story is about how a rich dying man tasked his subordinates to find his three illegitimate children in order to split his inheritance.
Sort of knew how things would turn out in the end as the movie was narrated as a flashback but I was still pretty impressed by the ingenuity of the person who managed to outwit and outsmart everyone else in the end!
Internet Movie Database Link