Christoph Willibald Glucks opera Orpheus and Eurydice is based on the Greek myth of Orpheus, who - unable to accept the death of his beloved wife Eurydice - descends into the Underworld to bring her back. Moved by his pleas, the Spirits grant him permission, but there is one condition: while leading her out of Hades, he must not turn around and face her.
Performed in a new English translation.