No matter how beautiful the castle built on sand – it will certainly be destroyed and to build in its place something real will be much more complicated.

The life of the Bogutsky family can be envied. Alexander is the true luminary in the world of medicine. His wife, Lyudmila, is a reliable helper and inspiration, and his daughter Lisa is an excellent student and a worthy follower of the family business. They have neither enemies nor envious men.
But one day, Ludmila receives a strange message – a photo of the grave of a friend who died many years ago. The echo of student friendship and betrayal comes back from the past and demolishes the prosperous life of the Bogutsky as a sand castle ...