Mysterious disappearances, nebulous cases, unsolved murders, Quebec is full of dark stories, each more puzzling than the next. Private detective Annie Richard , aka the crime duster, has selected for you a dozen of these investigations which marked her career with a hot iron, including: the kidnapping of SÔebastien MÔetivier, the first child whose face was reproduced on the boxes of milk; the quest of Laurette Perreault, who went looking for her son because of the inaction of the police; the imprisonment of Sidney Machell, wrongly locked up for twenty years in Bordeaux prison, with the insane. Supported by the families of the victims, but also by coroners, police officers and none other than the legendary Claude Poirier, this enthusiast goes back in time with the help of old almanacs, newspaper archives and various artefacts in order to collect new clues. Will she finally be able to shed light on some of the criminal enigmas of our history, so far unexplained?