Lake Chiemsee with its three small islands and its impressive Alpine backdrops attracts half a million visitors every year. Also as high is the number of migrant birds which rest on the lake, during their journey to the south or the north. With extensively produced pictures, this film presents wildlife living in or on the lake and demonstrates how sensitively the natural cycle reacts against all kinds of impacts by men. Amazing facts, which never have been seen before, are presented. Big predators swimming in flower meadows, tiny mammals harvesting reed, zebra mussels loving to stroll around, fungus gnat larvae shimmering in blue, pink flamingos and the hugest water flea on earth belong to the actors of this alternative portrait of the “Bavarian Sea”.