GuruRock's band wants to win the contest of the Battle of the bands, but this is not the only challenge ahead. In the Palace of Music, where the final prize is presented - a Stradivarius violin - a mythical chessboard leads to the most extravagant of the games: playing against an invisible opponent, a chess ghost that has never been defeated. And GuruRock decides to face him! Is this ghost going to be unmasked? And who will win the battle of the bands? In this adventure full of drama and mystery, we will realize that perseverance and friendship always prevail. And we'll also discover that Einstein, in fact, never left us - he's just an intergalactic traveler...