The proliferation of hydroelectric dams on the Mekong River, designed to supply energy to neighbouring megalopolises, is forcing Samnang, the leader of an indigenous community, to fight for his survival and that of nature. Under pressure from the authorities, Samnang is prepared to take any risk. Meanwhile, in the Cambodian capital, Sothy, a painter and survivor of the Khmer Rouge genocide, is committed to a duty of remembrance, revealing through his art a violence that seems to be repeating itself. A dialogue is established through space and time.