Polina Svirskaya worked in an art gallery for only six months. She was entrusted with conducting an examination of several drawings, but when she finished the work and handed over the folder with watercolors for storage, it turned out that one was missing... Investigator Sergei Dulo was called to the Ricks Hotel - Chilean citizen Michel Piñera was killed there. While searching the Chilean's room, Sergei noticed a picture hanging out of place. Underneath was a drawing stolen from his wife Polina - “A Man in Gray Against a Background of Mountains”...Neither Sergei nor Polina knew yet: while investigating this complicated case, they would have to face the tragic love story of a German pilot and the famous actress of the Third Reich, and also touch the great secret of all times and peoples - the location of the legendary Spear of Destiny...