Count Almaviva is in love with Rosina. However, she is currently staying with Dr. Bartolo – who desires to marry her. By using a series of disguises, Almaviva manages to pass letters to Rosina and serenade her with his beautiful voice. Dr. Bartolo does his best to stop Almaviva but is constantly thwarted. In the end, Count Almaviva marries Rosina and Dr. Bartolo comes to terms with his defeat.