This story has happened in Moscow of today to an archaeologist Alexei - a scientist working for a Doctor's degree, a charming young man with a southern blood in his veins. One fine day his rather quiet and happy life was ruined by an accident: his younger brother perished in one of the "hot places" where he, being half a southerner, recruited as the fighting groups volunteer. Deeply stressed and having found out that his brother was shot by a Muscovite who served there on a contract basis, Alexei decides to take vengeance. He tracks down the killer in his courtyard and picks up with his neighbour, a young woman Vera by name. Soon their acquaintance turns into a passionate love-affair. By all means Vera tries to restrain Alexei's temper that he shows since his brother's death. Vera earnestly dissuades him from a horrible decision. Finally they place confidence in each other and Alexei thaws. However, on a fixed day he sets off to do away with the killer, but in the very last moment he ...