Dominik, a PhD student at the University of Wrocław, specializing in the history of art, is sent to Porto Ercole by order of a professor to collect material about the most mysterious period of Caravaggio's life. When he meets Silvia and the local priest Paolo, he unexpectedly becomes part of a criminal intrigue, step by step discovering the carefully hidden secret of an inconspicuous town. It turns out that the world of art that Dominik has known so far is not what it might seem...