Ankan begins to question Bäckström's honesty. Eriksson turns out to have carried a big secret and now light has just been shed on the night of the murder. At the same time, Olsson risks ruining the entire investigation in a desperate attempt to impress Ankan.

End of season. Bäckström realizes that he must hand over Pinocchio to the Russians. The only problem is that he does not know where the music box is. The duck finally sees through Bäckström's lies and their relationship is put to the test. Can they still solve the case?