Abel Tiffauges is a simple Frenchman at the dawn of World War II who loves animals and children. The opening chapters revisit his childhood at a harsh Catholic boys’ school, where he prays to Saint Christopher that the prison-like institution will burn. By chance, while Abel is being disciplined for spilling lamp oil on the chapel floor, his friend Nestor accidentally sets fire to the building, burning it down as he wished. From that moment, Abel becomes convinced that fate is on his side and will shield him from harm.
In 1940, he works as a car mechanic in Paris, and photography becomes his hobby, allowing him to document the local children. When a girl named Martine steals his camera, he scolds her, and she falsely accuses him of assault. The police side with her, and Abel stands trial. Yet the tide of war turns in his favor: with Germany’s invasion, he is drafted into the army as punishment for the alleged crime, a twist of fate that pulls him into a much larger machine.
After France capitulates, Abel and his comrades are sent to a prisoner-of-war camp in East Prussia. He finds secret solace by slipping away to a hunting cabin in the forest, where he feeds a blind moose. One day, a German officer takes an interest in his bond with animals and explains that the moose is known as “The Ogre” to the locals before urging him to return to the camp. This moment plants the seed of a strange rapport with the Nazi world that is to come.
Weeks later, the officer returns and removes him from the camp, transporting him to Hermann Göring’s hunting lodge. The Chief Forester gives him a job tending the estate’s animals, a role that seems almost predestined for him. When Hermann Göring arrives, he initially appears cheerful, yet his true nature—sadistic, bombastic, and unstable—slowly reveals itself. Following alarming news that the German army has faltered at Stalingrad, Göring departs for Berlin, abruptly firing the lodge staff. Before leaving, the Chief Forester arranges for Abel to be reassigned to Kaltenborn Castle, a Nazi academy for boys, where power and danger mingle in equal measure.
At Kaltenborn Castle, Abel becomes a favorite with the boys, treated as a privileged servant. He regales the holidaying cadets with stories of life inside the castle, even as locals grow wary and publish pamphlets warning parents about “The Ogre.” An SS officer, Obersturmbannführer Raufeisen, is impressed by his ability to recruit and assigns him the task of bringing local boys to the academy. Although his intentions are earnest, the environment is strained, and Abel’s doubts begin to deepen as one trainee is burned during a training exercise that misfires behind another boy. Meanwhile, the castle’s owner, Count Kaltenborn, is revealed to be part of a plot to murder Hitler; he is arrested and disappears from the scene as the war tightens its grip.
With the Red Army breaching East Prussia, the castle’s leadership and the oldest cadets are sent to the front. One night, Abel witnesses a convoy of prisoners; a German soldier shoots a boy, then Abel uncovers a body-littered road. He rescuers a barely alive boy named Ephraim and hides him in the attic. As officers flee or perish, Abel and Frau Netta remain to tend to the remaining boys, and Abel realizes that the promises of victory peddled by Hitler and the Nazi regime are hollow. He urges evacuation, but the boys misread him as a traitor and turn on him, while veterans led by Raufeisen arrive promising a doomed last stand.
That night, Abel regains consciousness as the situation spirals. Soviet forces press forward, and the castle becomes a battleground. Abel tries to surrender, but Raufeisen’s troops close in, and the boys open fire in a desperate defense. He finds Ephraim again and escapes with him across the marshes as the castle burns, leaving no defenders alive behind. The escape is quiet, almost reverent, as Abel reflects on the tale of Saint Christopher, and the scene fades to black.