Twelve-year-old Martin is a little too small for his age. Too thin and too quiet, as his mother is unfortunately always reminding him. He and his blue baseball cap are joined at the hip, or rather, at the head. Martin and his parents have just moved to the quiet little town of Bellbach. A new home, a new school, but no new friends. Even on his first day, there’s trouble...

After his training as a policeman, the young, shy Köppe is transferred to a northern German town. Unfortunately, in an area where fox and rabbit say goodnight, there is little for a lawman to do. So Köppe kills time with the search for mysterious cow murderers, flirting with two attractive women and befriending a likeable petty crook.