Kikko is rehearsing for a recital when the Adventurers have to leave for Versailles 1764. They land right in the middle of another rehearsal - but this time it's the seven year old Mozart who is preparing for an important concert. The evil Agents are up to their vile tricks again and must be stopped. When The Hacker's Agents sell Mozart to a gypsy musician, it's Kikko who must step in and cover for Mozart until her friends are able to bring Wolfgang back - just in time.