“Grzegorz lived in his hermetic world for several years. He did not know the words, so he could not communicate, convey simple, basic information. When I heard him play and got to know his incredible story, I made a decision to devote a few years of his life and, through my film, help him get out of this closed world”, said the author of the script and director of the film Bartosz Blaschke.

Sonata stars Małgorzata Foremniak, Michał Sikorski and Łukasz Simlat, and it was produced by Sylwester Banaszkiewicz and Marcin Kurek through Mediabrigade in coproduction with TVP, the Krakow Festival Office and the Podkarpackie Film Fund, with the support of the Polish Film Institute.