This film explores the impacts of global warming on coastal cities. As the ice sheets of Antarctica and Greenland melt, sea levels rise. This poses significant challenges and requires action on the part of coastal cities like Jakarta, Rotterdam, New York and Alexandria. In this film scientists and policy makers of each city share their view on current problems and explain future plans. The film shows that all coastal cities face similar problems – problems that can be tackled more efficiently through an exchange of knowledge and intensive cooperation.