A light-hearted satire of manners and morals telling the story of two sisters that fall in love with the other's boyfriend. Complications arise. Valentina Serova is a prim professor who sets out to teach army lieutenant Eugene Samoilov/Yvengeni Samojlov some lessons in math but winds up learning lessons in love from him. Released in the US in 1946 as "Four Hearts" with the English titles written by Charles Clement.