A company president gets framed with a food-poisoning scandal and the only person who can help him is the evening cleaning-woman, who always seems to be at the right place at the right time.
Marc Elbichon, a novice private sleuth, is investigating a wave of assassinations bearing a particular characteristic: the perpetrator, dubbed the "telephone killer" always strangles his female victims with a telephone cord.
Four intertwining stories of bizarre occurrences in Paris featuring a man who was stolen away by fairies, a professor who becomes a tramp, the lovers who inherit a chateau – and the last tale that connects all that has gone before.
