Turn on. Switch off. Maccalou K.

At the Research Institute of Neurology, a dissected corpse of a sixteen-year-old girl was found. Lieutenant Karmain Delmoniko is sure: the killer is an institute employee - because an outsider will not be able to get into the building. But which of the prominent scientists committed this monstrous crime? Almost everyone can be suspected, but meanwhile the mysterious killer whom the ubiquitous press calls the ghost has already found another victim. Delmonico begins the investigation and very soon comes to the conclusion: the only way to catch a maniac is to understand how these killings are associated with a terrible crime committed thirty years ago...