Private revenge or green terror? Reiner Breuninger, chairman of a large car club, is attacked and held captive for a torturous night in the niche of a heavily trafficked car tunnel in Stuttgart. In a confession letter, the perpetrators announce further actions. The investigators from the state criminal police have little time to uncover the background, as the crime continues just two days later: In a village near Stuttgart, two men are kidnapped and tied up at the edge of a busy federal highway. In the small village of Lauberg, Commissioner Braig and his colleague Neundorf encounter a complicated web of feuding families, all seemingly eager to turn long-simmering desires for revenge into action.