A young woman marries the wastrel son of a British aristocrat. Her husband, who has been disinherited by his father, loses what little money he has left gambling in casinos and then dies, leaving her penniless and with an infant son. When her former father-in-law tries to get custody of the child, she leaves him with a couple she trusts, but when she later goes to reclaim her son, she can't find the people she left him with.

The port city of Bristol, England, in the 1800s is home to Java Head, a sailing ship line company. The owner has two sons. One, a handsome seafarer, is in love with a local girl, but cannot marry her due to a long-running feud between their fathers. After a lengthy voyage, he returns with a very exotic, noble Chinese wife, which scandalizes the conservative town. His other son, a "landlubber", seeks to convert to steamships, to the disgust of his father. Even worse, he is secretly dealing in contraband.