Half of all human beings admit to being unfaithful to their partner. But is the other half telling the truth? There's only one way to find out: spy on them with detectives or through digital media. And this is the anthropological experiment that A Hundred Nights proposes: an investigation of six thousand people without their consent in order to finally gather reliable statistics on the sexual behaviour of our societies. Irene, the main character, looks for the secrets of the human soul in sexuality. A Hundred Nights is a novel of exploration into our feelings, of study into eroticism, and of the police pursuit of a murderer who has left no trace of his crime. A Hundred Nights delves into the different ways we love, through loyalty, infidelity, unadmittable desires, the half-truths and deceits that swathe our relationships.