A song man goes wandering one day and later finds himself living with mermaids under a waterfall. As time passes he misses his family terribly and must make a choice. The freshwater and saltwater people of Arnhem Land battle over a freshwater woman. A chase ensues, and in a sacred section of river the freshwater people know that they must be silent and respectful - but the saltwater people do not. The saltwater people's disrespect conjures giant serpent.