Rome, June 1800. Floria Tosca is a celebrated opera singer, better known as La Tosca. Her lover is Mario Cavaradossi, a young artist and Bomapartist sympathizer. When the latter helps Angelotti, the leader of the opposition, to escape from prison and hides him in La Tosca's home, he antagonizes Baron Scarpia, the ruthless chief of police, all the more as his love for Tosca is unrequited. Scarpia has Mario arrested and condemned to death. Upset, Floria begs the Baron for her lover's life. He acce...