When the Sap, a wealthy young man, sees a black couple in an affectionate embrace, he determines to marry right away. After the wealthy girl who lives across the street refuses him, he decides to take a sea voyage to Honolulu. Following a series of misadventures, the Sap and the girl wind up adrift on the deserted ship and initially find it difficult to fend for themselves. They eventually are able to care for themselves, and after weeks adrift arrive at an island inhabitated by cannibals. The girl is kidnapped by the cannibals, but the boy rescues her by frightening the cannibals by appearing in a diving suit. They are eventually rescued by a submarine and share their first kiss.