Floria Tosca and Mario Cavaradossi are in love and
all they want is to be left alone. Baron Scarpia, however, wants Floria
for his physical needs. He arrests Mario for aiding a fugitive and tells
Tosca she can save him by giving herself to him. She agrees, but the
kiss he has so longed for is the fatal kiss of a knife blade. He had
promised to set up a false execution for Mario, but the treachery of
Scarpia is revealed as Mario is killed. Tosca vows to meet Scarpia in
front of God as she leaps over the side of the building to her death.