Girls disappear under strange circumstances in Moscow. Not stars, not fashion models, not daughters of bankers - but salesgirls and cleaners, unattractive, plump, with a failed personal life. And then they are found in their apartments, but already lifeless, with traces of strangulation with a thin cord. And on the body of each victim, experts find ancient sketches signed in French “Ingres”.Ingres is the name of the master of French neoclassicism. But how could the original sketches for the ingenious painting "Turkish Baths" get into the miserable Khrushchev houses on the outskirts of Moscow? After all, all the sketches for a great picture should be in the homeland of the famous artist, in the Ingres Museum in Montauban! The Parisian prefecture checks and... discovers the substitution. The case of the murder of girls develops into a crime of international proportions. A sophisticated killer plays a deadly game with the detectives, where they have to put together a puzzle step by step in order to understand what connects the dead girls from Russia and the idol of the French - the legendary painter Ingres ...