A routine patrol by Hubert and Girwidz comes to an abrupt end when a fallen branch blocks their path. As Hubert moves to clear it away, he discovers the body of physiotherapist Frank Albrecht. Apparently, Albrecht had fallen down an unpaved embankment with his bicycle.

Before Dr. Fuchs arrives, Girwidz is supposed to secure the initial evidence at the scene, but he twists his knee and ends up in the emergency room of the Wolfratshausen district hospital. He refuses to take sick leave and, despite his limited mobility and against Hubert's wishes, continues to take part in the investigation. During the autopsy, Dr. Fuchs determines that the fatal broken neck could not possibly have been caused by the fall.

The prime suspect in Albrecht's murder appears to be Joschi Breitenbichler, who had arranged to meet the victim at the time of the crime. In the Bavarian Oberland, he is known as the "bone breaker"—able to detect blockages and tension simply by touch. However, he has been legally prohibited from practicing his craft on people and allegedly now treats only horses and other livestock.

Had the victim discovered that the bone breaker was continuing to treat humans despite the court order? While Girwidz, with his injured knee, finds himself increasingly impressed by the bone breaker's healing skills, a second suspect unexpectedly emerges: Girwidz's own attending physician, the surgeon at the Wolfratshausen district hospital, Dr. Wilfried Söderling.

The rampaging boar Kurt is wreaking havoc in Wolfratshausen, throwing residents into fear and panic. Hubert and Girwidz are tasked with stopping the animal—by force if necessary. But despite not holding back on ammunition, the culprit escapes into the forest.

While searching for it, Hubert and Girwidz stumble upon the body of district forester Ulf Gröschel, with a gunshot wound in his back. Police Councillor Kaiser concludes that Hubert and Girwidz must have shot the forester during their wild boar hunt and promptly confiscates their service weapons. Although it turns out that the forester was already dead before the officers found him, Hubert and Girwidz are still ordered to undergo firearms training.

The first lead points to farmer Xaver Vogel, who had been seriously at odds with the forester. The problem: instead of controlling the wild boar population and maintaining the forest fences, the forester preferred to feed the animals—who were causing extensive crop damage. But Resi Gröschel, the victim's wife, also comes under scrutiny.

Meanwhile, Kaiser decides to take down the troublesome boar herself. Just as Hubert and Girwidz are close to solving the murder, they are suddenly shot at from ambush. The gunman escapes. Courageously, Hubert and Girwidz give chase—without considering that the suspect is armed, while they themselves are left with empty holsters.