A resident has been murdered in a remote Scottish monastery. His body is mutilated in the most incredible way. Five local monks know the deceased only by name - Anton. At the same time, everyone knows that he acquired a secret work office, hidden within the walls of his cell. And strange scientific materials have been discovered here. Who was Anton hiding from? What truth were you looking for? Why was he eliminated with such barbaric cruelty? Inspector Grace Campbell is assigned to investigate. And for her, the success of the case is the only chance to return to the homicide department, from where she was expelled for a serious mistake. Grace tries to regain her self-confidence, unaware that on her shoulders lies the solution to one of the most mind-boggling mysteries of humanity.