ER doctor Rike embarks on a one-woman solo sailing trip to Ascension Island in the Atlantic. When Rike comes across a sinking ship of refugees, she is quickly torn out of her contented and idealized world and must make a momentous decision. Aptly named after the mythological river that separates the living from the dead, the movie is an astute modern-day parable of Western indifference in the face of marginalized suffering.