S9, E7: For months, an unknown man has been terrorizing cyclists at Lake Starnberg. Until now, it was only a matter of damage to property, but when, during an operation at the lake, Hubert and Girwidz discover the body of an elderly cyclist who died not from a fall, but from a beating, it seems that the unknown man's intentions have turned more sinister. Station chief, Sabine Kaiser, declares the hunt for the "bike hater" a top priority. For Hubert and Girwidz, the case is tricky on two levels, as Girwidz has damaged the charging station for the new electric patrol car, but hasn't yet had the courage to confess it to the boss, and the duo are in danger of running out of steam in their search for the culprit...