James Gum Shoo and his friends think a class trip to the symphony might finally be mystery-free. Then a stolen flute turns the performance into a case, and the music is not the only thing that has gone silent. The friends have to listen carefully, notice what changes, and follow clues in a place where every sound matters. A concert hall may seem elegant and orderly, but this trip proves that trouble can hide anywhere, even behind beautiful music. The mystery gives young readers a chance to think about what belongs onstage and what might be happening out of sight. This illustrated chapter book is a lively choice for young readers who like school field trips, musical settings, and kid-sized detective work. It keeps the mystery accessible while giving readers plenty of reasons to keep turning pages. The musical backdrop makes every pause and interruption feel like a possible clue.