Eight days before the summer solstice, a man is butchered in a blood-freezing sacrifice on the ancient site of Stonehenge before a congregation of robed worshippers. Within hours, one of the
world's foremost treasure hunters has shot himself in his country mansion, leaving a cryptic letter to his estranged son. Teaming up with an intrepid policewoman, Gideon soon exposes an ancient
secret society with a charismatic and ruthless new leader at the helm.