Stray dog Sharik becomes Comrade Sharikov
In 1924 Moscow, Professor Preobrazhensky transplants the testicles and pituitary gland of Klim Chugunkin, a dead petty thief and balalaika player, into the stray dog Sharik, who turns into a vulgar, drunken man named Poligraf Poligrafovich Sharikov. Coached by house-committee chairman Shvonder, Sharikov demands living space in the professor's apartment, gets a job purging the city of stray cats, and denounces his creator to the authorities. The professor then reverses the operation, and Sharikov turns back into a contented dog.