Leo Gschwendtner, who runs his late father's lake boat excursion business with mother Verena, drowns at sunset in a drunk-bet duel 'practice' for the annual traditional 'Fischerstechen', a blunt lances joist on towing boats, fatally poisoned with a plant extract from a needle fixed to his color-coded lance, which may be meant for another during the official matches. Prime suspect is his opponent and school buddy, environmentalist activist Hansi Schwarz, whose group wants the boats banned and a bird sanctuary established. Leo also made candid nude pictures of him in bed with his lover Mia Grüner, daughter of Landrat (district official) Karl Grüner, who is also involved in bribery and blackmail.
—KGF Vissers