Astrid Thompson finally succeeds in fulfilling her father's dream: to bring together four Stradivarius for a unique concert. But Lise, George, Peter and Apolline, the four virtuosos recruited for the occasion, are incapable of playing together. The rehearsals are one ego crisis after another. Astrid decides to go and find the only person who, in her eyes, can still save the concert: Charlie Beaumont, the eccentric composer of the score.