Diana is an ethnic Armenian, but was born and lives in Moscow. Single―minded and ambitious, she is immersed in science and is not going to commit herself to family obligations, preferring free relationships to marriage and children. As a specialist in ancient history, Diana is writing a dissertation on the role of women in the Old Testament and dreams of becoming the youngest doctor of historical sciences among women. To work on her PhD, Diana arrives in Yerevan, where she accidentally finds a riddle in one of the manuscripts leading to the discovery of the location of Noah's Ark. A scientist embarks on a dangerous adventure and the charming conman Avet and the art critic policeman Ruben are forced on her as companions. In parallel with the Trinity, representatives of the most ancient Order come to search for the shrine.
