Popular GP Torsten Rathuber is murdered by saw-sabotaging his composite paddle on his aquatic sports club's latest kayak exploit. Hansen being booked for a police seminar, Korbinian Hofer must investigate partnered with delighted to return to field work chief Gert Achtziger. First suspect is sports shop owner Klaus Brandl, who as furious to be outvoted as club president in favor of Rathuber. Club treasurer Kerstin Wagner has her own secrets. Torsten's medical practice partner Richard Lackner fails to hide their recent brawl and previous judicial conflict, as the victim planned to dissolve it for a new career. Accountancy chief controller Felix Seitz seeks discrete advice to cover up a must unfortunate booking of police brass Dr. Lauser-Königs travel expenses.