Summary Mechthild lets Nele and the almost bald Jakob take part in her training to become a tour guide. She describes the story of the Gnadensee particularly vividly. In the Middle Ages, those sentenced to death were pushed from the boat into the lake after ringing a bell - with the chance of saving themselves by swimming... Franziska Grünwald, the owner of the Magellan sailing school, reports Lea Klein missing. When Julia and Jakob find one of Lea's sneakers in the lake and shortly afterwards her dinghy, their suspicions seem to be confirmed. Lea must have capsized during the night. But Julia has doubts, because the night was windless and Lea is an experienced sailor. Lea's single father, Robert Klein, is shocked. The skipper, who works all over the world, blames himself greatly for always having too little time for his daughter. His anger is directed at Nicole and Milena. The three girls were best friends and spent every summer at the Magellan sailing school. Robert believes Milena and Nicole incited Lea to do something stupid. Nicole and Milena claim that Lea suddenly disappeared during the night, but Nele doubts this. Then it turns out that Franziska Grünwald was robbed. 60,000 euros have disappeared. Money that Robert also knew about. Was there an argument between Lea and Franziska? What did Nicole and Milena know about it? It has long been clear that hurt feelings also play a role. Paul gives the case a decisive twist when he demonstrates an old sailor's trick. Buried feelings awaken in him because he meets Amira again for the first time in years. After fleeing Afghanistan, she needs a place to stay and something to eat. Paul begins a solo tour under Nele's suspicious gaze.

• Crime