The document provides a summary of the opera Tosca by Giacomo Puccini. It discusses the key themes of love, jealousy, hate and death in the three-act opera. Act I introduces the characters of Floria Tosca and her lover Mario Cavaradossi, set in a brightly lit church in Rome. Act II features the villain Baron Scarpia who tortures and kills Cavaradossi. In Act III, driven by grief and anger, Tosca kills Scarpia then commits suicide by jumping from a castle tower.