Welcome to Basle, where the winds can murder at will. For generations, technology has made the world a crime-free zone - until now. A new killer, bound to the will of the winds, is committing a series of terrible and violent crimes. Not only that, but the rain is incessant and water levels are rising. Soon the dams will be breached, and all Basle will be under water. Roberta Morgenstern and Clement Martineau must track the assassin, the mysterious Baron of the Mists, and save the city...