Styx. Emergency doctor Rieke (Susanne Wolff) embodies a Western ideal of happiness and success. On holiday, she attempts to fulfil a long-held dream by sailing alone from Gibraltar to Ascension Island in the Atlantic. But her trip drastically changes course when she encounters a damaged boat overloaded with desperate of refugees. Stricken by their plight, she tries her best to help them, but as time goes by and the situation worsens, she is forced to make a life or death decision.