When a darkly dressed figure enters the Graubündner Kantonalbank in Chur on a rainy Friday morning, crime takes its course: the robbery fails, the bank director is killed. Days after the ceremonial burial, a gamekeeper thinks he has found the director's body in the enchanted Scaläratobel in the Chur Forest northeast of the city. How can that be? The bishop himself has left him in the grave, the resting place in the cemetery is untouched. Hours later, crows circle screeching over the foggy ravine, which everyone has known for generations to be cursed. When Landjäger Caminada and Lieutenant Marugg have completed the steep and dangerous ascent to check the witness statement, they find something gruesome. But this is only the beginning, because the gate to hell is wide open.