"Mr. Kleks' Academy" is a modernized version of Brzechwa's classic fairy tale, appealing with its content and form to the youngest, but also entering into a dialogue with older viewers who still remember the cult film adaptation from the 1980s. The film presents the story of a seemingly ordinary girl - Ada Niezgódka - who to the titular Academy to discover the world of fairy tales, imagination and creativity. With the help of an outstanding and crazy teacher, Professor Ambroży Kleks, she develops her amazing skills and also finds a clue that will help her unravel the biggest family mystery...