Engrenage

A young adult, Mat, is hired as a phone operator in a company of import-export. He spends his days to transfer calls and to take messages for various executives. The first day of his contract, someone takes him for a girl. Mathieu is upset, but instead of immediately restoring the truth, he plays the game. The phone conversations and the gifts from the mysterious interlocutor multiply. A game that exceeds Mat quickly, a game that will lead him soon in a blood bath. - IMDb