Shy musician David is hired to teach guitar, to their attractive teenage daughter, by a magnate and his younger wife. He is rapidly seduced by the mother, watched by a mysterious female neighbour. Before long he is embroiled in a web of voyeurism, suicide and murder; does her formidable husband know? Is their curious neighbour sane? Who is video-taping their affair? And who is the man following the guitarist? An elegant, teasing narrative unfolds in this stylish and critically acclaimed French thriller.