Night on Bald Mountain work until 1866, by which time he was planning the orchestral tone poem "St. John's Eve on Bald Mountain" (see below). No trace of a work for piano and orchestra has survived outside Rimsky-Korsakov's recollections, so it is assumed that the score has been lost, or, more likely, that it never existed. In 1866 Mussorgsky wrote to Balakirev expressing a desire to discuss his plans for "The Witches", his informal name for his "Bald Mountain" music. In early June 1867, he began composing the orchestral version of the piece. The score is inscribed with the following details: Conceived in 1866.
Night on Bald Mountain her father Mstivoy, the Prince of Retra, have poisoned Mlada, the betrothed of Yaromir, Prince of Arkona. Voyslava sells her soul to Morena, an evil goddess, to obtain her aid in making Yaromir forget Mlada so she may have him to herself. In act 3, the shade (ghost) of Mlada leads Yaromir up the slopes of Mount Triglav to a pine wood in a gorge on top of the mountain. Mlada's shade joins a gathering of the spirits of the dead. She expresses in mime to Yaromir the wish to be reunited with him in the kingdom of dead souls.