Rome.1800. June 17th. Noon. The famous prima donna Floria Tosca visits the basilica of Sant'Andrea della Valle. Twice. The first time to act out together with her lover Mario her usual scene of jealousy. The second time to fall in the trap of baron Scarpia, the lewd chief of police. How could she have predicted that in the next sixteen hours, she would have to confront a rape attempt, to witness the torture and shooting of Mario, to stab Scarpia and, finally, to put an end to her life by leaping off Sant'Angelo Castel?