A third part of story about a Soviet spies trying to infiltrate German Intelligence center "Saturn" during and after the WWII.

One evening, in the company of his friends, the bachelor Stas for the sake of entertainment called the number, the numbers of which were called by his friends, putting a comic condition: “If a woman answers, you marry her.” A really pleasant female voice responded. Stas didn't dare to admit his company in this, again wanted to hear it, but couldn't remember the phone number. Then he asked everyone to remember their number. Having got acquainted with Lyudmila, Stas realizes that she is the woman of his dreams.