The year is 1956. Yuri Knorozov arrives in Copenhagen to prove to the world community the correctness of his deciphering of the Maya script and to refute the myths about the "apocalypse" allegedly predicted by their calendar. Its opening threatens the interests of a number of foreign countries. Against the background of scientific intrigues, he meets the journalist Mercedes, who awakens memories of her first love, but in reality is connected with a plan by foreign intelligence services to discredit the scientist.