The psychiatric hospital “Geiostad” in Oslo. At dawn on a cold winter day, one of the patients is found strangled. His mouth is open in a silent scream. Police inspector Sara Geringen, who arrives at the scene, immediately understood that she was dealing with an extraordinary case. Questions arise one after another: what is that strange scar shaped like the number 488 on the victim’s forehead? Where did the ominous drawings on the walls of the hospital room come from, where he was held? Why does the hospital administration have almost no information about the identity of the person who spent more than thirty years there?
Thus, Sara begins a tangled and extremely dangerous investigation that will force her to travel around the world: Paris, London, the volcanic island of Ascension, abandoned mines in Minnesota, Nice… Her partner will be a French journalist named Christopher Clarens, and together they must uncover the astonishing truth buried in ultra-secret laboratories.