December 1924, Karl Denke fails to smite Vincenz Olivier with a pickaxe. He would have been his 31st victim. The film thus reconstructs the mind, motivation, and psyche of its main character in intense dialog between him and the inspector.
The story follows Boris, a charismatic tour guide who unexpectedly reunites with his estranged father Julián. Their tense and emotional encounters explore past wounds and the possibility of forgiveness.