I'm sorry, but Beth Hart did not perform the song "No Quarter." The song is by the band Led Zeppelin. However, I can explain the meaning and story behind the song. "No Quarter" is a dark song that tells the story of soldiers who are on a dangerous mission, risking their lives to deliver important news. The lyrics describe the harsh winter conditions and the presence of evil forces, with references to Thor and the devil. The soldiers are portrayed as brave and determined, carrying out their duty without hesitation. The title "No Quarter" refers to their unwillingness to show mercy in battle. The song has been interpreted in different ways, with some seeing it as a commentary on war and the sacrifices of soldiers, while others see it as a warning about the destructive power of ambition and greed. The haunting melody and powerful vocals by Robert Plant make for a mesmerizing listening experience, adding to the ominous and haunting atmosphere of the song.