"Doga and Unei"(ドーガとウネの館, Dōga to Une no Kan?, lit. Doga and Unne's Home), also known as "Let Me Know the Truth", is a theme from Final Fantasy III, and was composed by Nobuo Uematsu.
"Doga and Unei" was first released in the original version of the soundtrack, of which it was the thirty-sixth track. It was remastered for the original soundtrack of the DS version, of which it is the forty-seventh track.
If the player manages to collect the items Doga's Artifact and Une's Mirror at the Treno Auction House, and examines the music player at the inn of the Black Mage Village, the background music will change to "Doga and Unei". This version was released as "Doga and Une" (ドーガとウネ, Dōga to Une?) on the Final Fantasy IX Original Soundtrack PLUS album as its thirty-seventh track.
"Doga and Unei" is included in the track "Their Spiritual Leader" from the album. The song is sung in English by Dido, a duo comprising of Michiaki Kato and Shizuru Ohtaka, and the English narration at the beginning of the song is by Jeff Levy.