The Polish drama series "Wielka woda" tells the story of the struggle against the elements during the strongest flood in Central Europe in 1997. The water approaches the huge and densely populated city of Wrocław. Special service employees must make a difficult decision: to risk and allow the flood to reach the center, or to sacrifice the "small" - the residents of the surrounding villages - in order to save the city. At the epicenter of the disaster are three main characters whose destinies will be forever changed on this day.