A 35 ans, Sam est un casseur de coffres hors pair. Entre la garde de son petit garçon qu'il élève seul, son grand-père qui rêverait de le voir rejoindre l'entreprise familiale, sa petite amie qui se lasse de ses mensonges, il essaie désespérément de devenir un Mensch, un homme bien.
Manon, Aurore and Marie would like to represent their school at the Youth Challenge “Dance Special” organized by Paris’s city hall. If they win, they could have a month’s vacation in a country of their dreams, free from all constraints.
A former world-famous conductor of the Bolshoï orchestra, known as "The Maëstro", Andreï Filipov had seen his career publicly broken by Leonid Brezhnev for hiring Jewish musicians and now works cleaning the concert hall where he once directed. One day, he intercepts an official invitation from the prestigious Théâtre du Châtelet. Through a series of mad antics, he reunites his old orchestra, now composed of old alcoholic musicians, and flies to perform in Paris and complete the Tchaikovsky concerto interrupted 30 years earlier. For the concerto, he engages a young violin soloist with whom he has an unexpected connection.