[2] An international co-production of Poland and the Soviet Union,[3] the film is based on the 1946 children's novel of the same name by Jan Brzechwa, and is divided into two parts: Przygoda księcia Mateusza (Prince Matthew's Adventure) and Tajemnica Golarza Filipa (Mystery of Philip the Barber).

[4] Akademia pana Kleksa stars Piotr Fronczewski and Sławomir Wronka.

In addition to the main storyline (the adventures at the academy), the film develops various other subplots, such as the story of the mysterious magpie Mateusz, who was once a prince, Adaś's journey to the dog heaven, and more.

The idyllic atmosphere of the film is disturbed by the character of Golarz Filip, the antagonist, who sends an android called Adolf to the Academy to destroy the fairy-tale world that exists there.

[7] In 2024, the second part of the film was released titled Kleks i wynalazek Filipa Golarza.