Requiem Pour Une Tueuse (2011)

Lucrèce  is a contract killer in search of a new life. Specialized in the  use  of poisons and enamored with opera, she accepts a difficult, final  hit  in a castle in the heart of the Swiss Alps. Posing as a soprano,   Lucrèce must perform on stage during the very prestigious Festival of   Ermeux and slaughter one of her co-performers, British baritone   Alexander Child, who recently bought a distillery in Scotland, and thus   became the only obstacle to a strategic pipeline project with   considerable financial ramifications. He just won a long legal battle   against British Oil, who now has no other choice but to eliminate him.   To complicate things, French counter-espionage learns of the hit and   sends Rico, a reinstated former agent, to infiltrate the orchestra,   unmask and terminate all who wish harm to Alexander Child. Rico has no   information on the killer and has a lot of trouble identifying her amid a   horde of suspicious characters: an obnoxious conductor...
