The film focuses on the lives of three boat people on Chao Phraya - Sang, Prang and Tubtim - who load sand from Chainart, a province near Bangkok and float it downstream to unload at a sand dock in the city at a higher price. Bored with life in a boat, Prang decides to leave her family to pursue her dream of becoming a movie star in Bangkok. Sang (Prang's husband) soon sets out to look for Prang in the big city...