Luna's nightly duties: Night court and dreamwalking. She's started having a favorite pony's dreams to visit, especially after a long, hard night of Night court. Most nights it tends to be a dream about a large party hall filled with ponies, dancing to Vinyl Scratch's killer beats. One night, however, as soon as Luna enters Vinyl's dream to wind down, she notices something wrong. Can Luna figure out what's eating Vinyl Scratch?