The Bulgarian intelligence service has information that the top agent Peron is to arrive in Bulgaria. The higher official of the counter intelligence Ivan with an alias Y 17 is to investigate. Peron has to meet his local contact, the former ship captain Rudnev. The young Mina is accommodated in Rudnev's home. Rudnev figures that she is counterintelligence and agrees to cooperate with the task force. Soon after, Peron meets Mina and an eccentric engineer, fired from the job. The young man is the deep undercover agent Y 117. Peron tests the man. He tells him that Mina is an agent of the Bulgarian counterintelligence, and gives him a gun to kill her. Y 117 shoots Mina but the bullet was a blank. After that Y 117 should leave the country with Peron.

In this picture, the barrier epitomizes the line between reality and dreams, the pattern of harmony and happiness. The delicate, pretty, sensitive Dorotea and the sedate middle-aged composer Antoni meet by chance. He gives her shelter in his house. Famous composer falls under the spell of young Dorothea: A pretty, thin-skinned, though quite an eccentric girl.

Friends of different generations, practicing different professions, spend together their summer holidays at the seaside every year. It is sunny; they look carefree and happy. They know each other very well, they are used to each other. To such an extent, that bore becomes inevitable. It is boredom that incites them to play a dangerous game. The end is dramatic: a young boy gets killed. It is the moment to draw the bottom line. The question is: Isn't the death of the spirit worse than of the body?