Elena Meshcheryakova is a veterinarian at an animal clinic. One day, she spots a stranger in a crowd who leaves an unforgettable impression on her. But how can she gather the courage to simply approach him and introduce herself? Fate intervenes when he shows up at the clinic, wanting to get rid of his dog. Elena refuses to put the poor animal down and instead takes it in herself. As events unfold, Elena ends up in a hospital where the head psychiatrist happens to be a friend of the man she fell for. It is he who ultimately helps her find happiness.

A crime has been committed. Thanks to the determination and perseverance of a young police criminal investigation officer, it is possible to get on the trail of a seasoned repeat offender and solve a long-standing crime related to the disappearance of diamonds of the famous Siberian merchant Kukhterin in February 1917.