A biology professor, Adam, after several dizzy spells, enters a hospital for observation. He is a loner and a serious-minded man, who dislikes any display of emotions. He spends three months in the hospital while being tested. After observing patients and hospital routines around him from a distance, he learns that he will need a kidney transplant. Meanwhile his personal and professional life is falling apart: he refuses his wife's offer to donate the kidney for him; the scientific problem he was working on has been solved elsewhere. In the end Adam cracks under the prolonged pressure, waiting for the sound of an ambulance bringing a moribund patient whose kidney may be used for the transplant.
Jaruga, the head of the local Security Office, cannot liquidate the "Boruta" unit. Most likely, he has his man in the UB. In order to unmask him and liquidate the unit, Albert, an employee of the UB, acting in complete conspiracy, arrives.
A retired police captain, Siwy, tells a reporter about his latest action, carrying on his own investigation into the mysterious death of a Eve Salm, a.k.a. Princess. She was a witness in a case where the defendant pled guilty and was sentenced to eight years in prison. Siwy doubts the defendant's guilt and risks his life to apprehend the real killer.
