A young actress rehearses on stage the play of her mental life. Where is the play, where is the reality? The character's real life and the baroque show seem intimately linked in the closed universe of a somewhat seedy theatre. On the advice of her director, Elisa ends up breaking her chains by accepting herself as she is. While she sings an opera, the walls of the theater disappear. Transported to the street, she continues her euphonious and optimistic number.