The Joy of Singing

Constance Muller's husband was recently killed and the USB stick on which he stored his uranium secrets has gone missing. Secret agents Philippe and Muriel are assigned to the case, and in order to find out if Constance knows where the stick is, they join in on her singing class with Mrs. Eve.

However, Constance's sister-in-law Noemie, who's in cahoots with Iranian radiologist/terrorist Reza, is also trying to find the invaluable USB stick. She hires Julien, a male prostitute with a golden voice, to register in the class to see if he can find out anything. Also in the class is Anna, who may be working for the Russians or Mossad. What transpires is a dance of seduction and treason between the real and fake students, while corpses pile up around them.