As sea levels rise due to global warming, what does the future hold for our coasts? Already threatened by rising tides, Jakarta, the capital of Indonesia, is in a perilous situation - it is sinking. We join reporter Resty Woro Yuniar on a crumbling sea wall to hear the reality of living under sea level, and speak with the engineer responsible for fighting flooding from both the sea and the mountains. We hear about plans to abandon the city as a capital, and try again on drier land. Author Jeff Goddell describes being next to the glacier that could show just how high the oceans could rise. Solutions in the past have involved building our way out of this problem, but some locations will be too expensive to save. Is Jakarta a warning to us all?