Emma meets Oliver Davis on Kramgasse in Bern, a collector who claims to have a Blum Box. From his description, Emma suspects that it could be the box with which Ursula and Victor posed in the photo at the Photo Elysée museum in Plateforme 10. Blum is an audio drama produced by El...

Emma manages to decipher a hidden melody in Ursula Blum's paintings with the help of Sonia, the friend at whose house in Lucerne she is staying. The next day she visits the Museum für Gestaltung in Zurich to try the melody out on a Blum Box. Blum is an audio drama produced by El Extraordinario,...

Emma returns to Basel to interview the restorer of a Blum Box, one of the music boxes manufactured by Victor Blum, Ursula's cousin. Later, she meets with Christina, and together they develop a hypothesis with all the data they have gathered during the investigation. Blum is an audio drama...