A body is found on a frozen village pond in the Waldviertel. Ironically, the former police officer Sepp Ahorner finds the dead man. When the Linz Commissioner Grete Öller and her young colleague Lisa Nemeth arrive in the sleepy village, the case seems clear at first. But then new evidence points to a different track. To clarify the case, the commissioners now need the help of Ahorner, because the villagers are closed to the two women. But soon Ahorner is in the quandary, because his own family is under suspicion ...