A mystery from Nadine Mousselet, the Agatha Christie of Normandy.

In the bay of Mont-Saint-Michel, the tide is said to rise at the speed of a galloping horse. That morning, it left in its wake the body of a woman, planted headfirst into the muddy banks of the Couesnon, her head... scalped! What kind of person would be sadistic enough to do such a thing? Freshly graduated with a degree in criminology, Laura Claes has her own ideas on the matter. Especially since her college friend, the redheaded Cynthia, has also fallen into the mad scalper's clutches. But how can Laura convince the police that she, and she alone, can unravel this bloody mystery?