Patients are found dead “accidentally” some time after returning from a spa treatment in Vernet-les-Bains or Molitg-les-Bains. At the same time, the association run by Jean-Jacques Bataille makes an invaluable archaeological discovery near Elne. All these events will lead Doctor Bousquet to travel to Budapest, be attacked there, contract a bacteria, reconnect with a long-lost cousin, investigate in the Nohdes nature reserve, and take a bullet to the lung…

Until the denouement, where action and the supernatural intertwine…