A bitter-sweet ballad that Spock is compelled to sing by the telekinetic Platonians in Plato's Stepchildren, as part of the entertainment their leader Parmen forces from the Enterprise officers.
Maiden Wine is heard in the third-season Original Series episode Plato's Stepchildren, set in 2268. The Platonians, a handful of long-lived aesthetes with powerful telekinesis, keep Kirk, Spock and McCoy on their planet and amuse themselves by making the officers perform.
After Uhura and Christine Chapel are brought down from the ship, the two couples are dressed in Greek costume and paraded before Parmen's court. Spock, accompanying himself on a lyre, is made to serenade the women with the song, an ironic lament about the cost of love.
The humiliation ends once Kirk and Spock acquire the Platonians' power for themselves by means of a kironide injection. The song was written for the episode by Leonard Nimoy.