It is a remake of Charade (1963) and an homage to François Truffaut's Shoot the Piano Player (1960) complete with the French film's star, Charles Aznavour, making two appearances singing his song "Quand tu m'aimes" (first in French, later in English).
Et ass e Remake vun der Charade (1963) an eng Hommage un de François Truffaut's Schéiss de Piano Player (1960) komplett mat dem franséischen Filmstar, Charles Aznavour, fir zwee Opstänn ze sangen seng Lidd "Quand tu m'aimes" (éischt op Franséisch, spéit op Englesch).