In August 2002, the Vltava River rose beyond anything Prague's engineers had planned for, and this film reconstructs the days when the city fought to save itself. Zookeepers race to evacuate more than a thousand animals from Prague Zoo as enclosures flood, some too late. Engineers and historians examine the 14th-century Charles Bridge as flood barriers strain against water levels nobody alive had seen, testing whether medieval stonework can survive a modern deluge. The film moves beyond Prague to the wider flooding that hit Central Europe that summer, using archival news footage, water-level data, and interviews to show how forecasting systems built for ordinary floods failed to anticipate a five-hundred-year event. It traces the emergency response as authorities improvise evacuations and shoring efforts in real time, and it lays out what the disaster changed in European flood defense planning afterward. The mix of disaster footage and technical explanation keeps the focus on how the water moved through a city built centuries before anyone imagined it.