Watch Tosca for Free: How to Stream the Movie Online at 123Movies. . Tosca is a melodrama of love, betrayal and death set in the revolutionary unrest of 1800. The story concerns the opera singer Floria Tosca who tries to save her lover, the painter Mario Cavaradossi, from the brutal chief of police, Scarpia. Through-composed and expertly orchestrated it contains some of Puccini’s best-known lyrical arias and remains one of his most performed operas. In this 2022 production, an eminent cast is directed by the acclaimed Australian director Barrie Kosky – ‘the Amsterdam audience was completely swept off its feet by Kosky’s stunning production’ (Opera News).