Jan, the café pianist, comes from the countryside. The talented boy was taken care of by an old organist. Jan then studied at the conservatory, where he made friends with Paweł, an undisciplined but very talented composer. Paweł's works gain publicity abroad, but he himself, unable to bear human envy and accept the loss of his beloved girl, commits suicide ... Jan's father dies, and soon his mother ...
A group of teenagers dream of adventures and experiencing something unusual, mysterious and romantic. The boys play treasure hunters and detectives in an old park adjacent to a modern housing estate. By accident, the heroes find the trail of a youth gang that stole the documentation of a sensational preparation that can be used in the preparation of animal feed. The gang members manage to suspect the inventor of the preparation, the engineer Tyc. His son, Andrzej, and his friends decide to expose the real criminals and find maps that are to indicate the place of the hidden treasure.