Tom and Samantha Pascoe together with Mary and Jim Roberts have jst finished their first sucessful season running an Artists' Holiday Center in the foothills of the Pyrenees. They are looking for a well earned break but it is not to be when a foul ritual murder is discovered near their property. Ex-copper Jim Roberts investigates and finds that the victim is an English University student researching Sacred Geometry for his Ph.D Thesis.

The victim hasbeen hanged and gutted and yet the French authorities decide to call it suicide. Roberts investigation leads him to the dark world of Secret Societies and secret government departments that will stop at nothing to preserve their secrets.