The Vatican Secret Service receives a dozen anonymous letters warning that a conspiracy has been hatched in Milan that could crush the Church. The monastery of Santa Maria delle Grazie is named as the center of heresy, namely the fresco in the refectory, on which the artist Leonardo da Vinci, invited from Florence, is working. What message did the brilliant master, an unsurpassed inventor and cipher hid in his creation? Read the novel, and you will never be able to look at this picture with the same eyes again: it will speak to you - with every detail, with every gesture, for the greatest secret of “The Last Supper” will be revealed to you. .