An ordinary, run-of-the-mill salaryman, Satake Hirofumi, goes on a cruise with his business client, Kito Joji. They spend a fun time out on the sea, but the cruiser gets destroyed when a whale crashes into it. Satake and Kito evacuate on a lifeboat, but they're adrift alone in the Pacific ocean. Provisions and water gone, they're on the verge of death. The only thing left in Satake's hand was a gift from his fiancée, Negishi Chie: A lucky coin pendant.
Drinking seawater, which has 3.5% salinity,
 raises the salinity of bodily fluid.
%وشرب مياه البحر الّذي نسبة ملوحته 3.5
يرفع من ملوحة السّائل الجسدي
Wenn man Meerwasser mit 3,5 %
Salzgehalt zu sich nimmt,
En buvant de l’eau de mer
dont le taux de salinité est de 3.5 %,
Bere acqua marina, che ha una salinità di 3,5%,
aumenta la salinità dei fluidi corporei.
Beber água do mar, que tem salinidade de 3,5%,
 aumenta a salinidade dos fluidos corporais.
Если пить морскую воду, где 3,5% соли,
вырастет уровень соли и в организме.