Watch MyFlixer. In 1948 on the Gardno lake near Szela village 21 girl scouts drowned. It was supposed to be a dream day. The girls wanted to see the sea. That morning they went to church, sleep-deprived – the previous night they had sat for a long time by the bonfire, busy discussing an old legend about princess Wanda who drowned in the rapid currents of Vistula river.