[4] The opera received its world premiere on 28 July 2016, at the Haus für Mozart, Salzburg.
[16] The role of Leticia required soprano Audrey Luna to sing an A above high C, which is the highest documented sung note in the history of the Metropolitan Opera.
Act 1 The Nobiles are expecting guests for a dinner at their mansion in honour of the opera singer Leticia Meynar.
Conde then confides to the explorer Raúl Yebenes that Leonora is gravely ill and does not have long to live.
In the cloakroom, Lucía gives her secret lover, Colonel Álvaro Gómez, a fleeting kiss.
Russell and Colonel Gómez are horrified as some guests remove their tailcoats, but eventually they too lie down to sleep.
Conde examines Russell, and diagnoses him as terminally ill. Julio is supposed to prepare breakfast, but reports that no supplies have arrived at the mansion.
Blanca frets about her children, but even she and her husband Alberto Roc, a conductor, cannot leave.
Silvia finds this situation humorous, with the knowledge that her son Yoli is safe with his private tutor, Padre Sansón.
Russell's condition has worsened, as he has fallen into a coma and needs urgent medical care.
Conde and Colonel Gómez haul his corpse into the closet, as Eduardo and Beatriz watch secretly.
Act 3 Police guarding the mansion drive back a crowd of people gathered outside.
Leonora, in great pain, entreats the assistance of Dr Conde and the Virgin Mary.
Whilst delirious, Leonora sees a disembodied hand wandering around the drawing room.
Leonora recalls a premonition from the night of the opera performance, and attempts a magic ritual with Blanca and Leticia.
In a fresh quarrel, Raúl tosses Francisco's box of pills out of the drawing room.
Silvia cradles the corpse of one of the lambs in her arms, thinking that she is rocking Yoli to sleep.
Gradually the idea spreads among the guests that a sacrifice is required to secure their liberation, specifically the death of Edmundo.
With her encouragement, the others hesitantly repeat their actions from that first night, but one character acts differently at one key point.