Nancy, Bess, and George are really excited about the bike race River Heights is holding during the girls’ spring break. The winner gets lots of cool prizes! George is the most excited because she thinks her bike is the fastest. But a few days before the race, her bike disappears! Nancy and Bess promise to help George find it, but this bikenapper leaves almost no tracks to follow. Nancy must pedal her way through this mystery—and fast—or else George will be sitting on the sidelines!