Bomgard, a young doctor recently transferred from a rural area to a small town hospital, receives an urgent message from Polyakov, the doctor who replaced him. Polyakov has become ill; he needs medical help. Before Bomgard can respond, however, Polyakov arrives at the hospital, dying of a self-inflicted wound. In his last moments, he gives Bomgard a notebook, on which is recorded the story of Polyakov's addiction to morphine.

Polyakov first took morphine to relieve an abdominal pain. He found that it also relieved his despair over the loss of his lover, an opera singer in Moscow. Morphine relieved his loneliness and improved his work. He gradually increased the dose until he became hopelessly dependent on the substance. He failed in his attempts to break the habit at a clinic in Moscow. Eventually there is nothing in life but the drug and Polyakov suicides.