Influential businessman Vladimir owns enterprises for the development and sale of technologies that allow you to see the hidden. Around him and his young wife Catherine, events unfold that take them into the past. They witness Felissa Kruut's love triangle in the 1920s and 1930s. In the present, Catherine meets the young musician Stepan and her real love life becomes a reflection of the life of Felissa Kruut in the past. Vladimir, unable to observe from the outside and come to terms with his wife's infidelity, is trying to interfere with this relationship.