Nancy tracks down a thief at a music festival in the twenty-eighth Nancy Drew Diaries, a fresh approach to a classic series.

A three-day music festival is coming to a large farm near River Heights. Bands will be playing all weekend on the outdoor stage, fans will be camping out on site, and local businesses are expecting an influx of customers from the sold-out event. Nancy, Bess, and George weren't planning to go, but the director, a family friend of Ned, reaches out seeking Nancy's sleuthing skills.

The festival is supposed to end with a raffle of an electric guitar donated by the headlining group, but the guitar has been stolen! If the band finds out, they might drop out of the show. It's up to Nancy and friends to find the culprit before this major music festival becomes a major disaster. But in a crowd of thousands of attendees, how can Nancy zero in on the thief?