A ship with doubles sails from the pier on the Moscow River, heading with a show program to one of the provincial Russian cities. The murder of Thatcher's look-alike that happened on board is being investigated by police captain Zharov.

Having enthroned the wife of Peter the Great and his mistress Catherine I, Menshikov receives unlimited power, thereby causing envy and indignation of his former allies in the coup. Taking advantage of his absence, they are plotting against His Serene Highness. But once again, luck accompanies the brave darling of fortune: having received a warning of mortal danger, he escapes arrest and enters the boudoir of the Empress.