A train journey traces western Thailand's relationship with water, starting at Mae Klong on the Gulf of Thailand, where a market spreads directly over the railway tracks and vendors clear their stalls in seconds as engines approach. The route crosses khlongs, the canals that thread through the region, passes salt fields where seawater has been evaporated for centuries, and follows rivers where elephants bathe and houses stand on stilts. The film's second half turns to history: the line running northwest from Bangkok is the so-called Death Railway, built by prisoners of war and forced laborers under the Japanese army during the Second World War, of which less than a third survives today. Footage of the bridge on the River Kwai, the Hellfire Pass memorial, and interviews with researchers and a Buddhist abbot document how the episode is kept in memory. The film moves between landscape, daily commerce, and wartime history along a single stretch of track.