The mighty Brahmaputra River is rising again, ready to swallow everything in its path. On a disappearing mud island, 12-year-old orphan Afrin prepares to leave the only world she has ever known. When the floodwaters submerge her home, she refuses to surrender to its deadly tides. Afrin rows herself in a wooden boat toward the teeming metropolis of Dhaka to find her estranged father among the millions of climate refugees. Forced to grow up fast, Afrin must confront the mysteries of a sinking world.