In the end, it is a triumph of vocal artistry, a bel canto masterclass that inspires to this day. The wind can clearly be heard throughout the performance as costumes, trains, scarves and robes billow up, creating a spontaneous drama all of their own. Costume designer Gioia Fiorella Mariani, the niece of Roberto Rossellini, talks about her fears that the meters-long trains would rip apart. To her surprise, she encounters the tearful singer after the acclaimed performance and learns that she is in fear for her health. As it turns out, Montserrat Caballé must undergo an operation just weeks after her appearance in Orange.

For this documentary, Caballé’s brother Carlos gives his first interview following his sister’s death in October 2018. Carlos had accompanied her throughout her life and was also in attendance for the rehearsals and performances in Orange in 1974. Soprano Sonia Yoncheva and Olga Peretyatko tell of their admiration for "La Superba," as Caballé was known to her fans. And just a few short years after this performance, Maria Callas would describe Caballé her as her true successor – high praise indeed.