1860 ushers in the era of iron ships, Richard Sibley, a builder of wooden ships, stubbornly resists the change, which leads him to forbid the marriage of his daughter Rose to John Rhead, a proponent of the new method. This injustice outrages John's sister Gertrude so much that she breaks off her engagement to Sibley's son Sam. Meanwhile, John and Rose elope. Twenty-five years later, John has grown rich and conservative and has a daughter named Emily. Gertrude, still single, tries to help her niece Emily marry the man she loves, Arthur Preece, rather than her father's choice, old Lord Monkhurst, but Gertrude fails. Twenty-five more years pass, and John again attempts to interfere by opposing the marriage of his granddaughter Muriel to Richard Sibley, Jr., an engineer. This time, however, Muriel's independence wins and she marries the man of her choice, and after the death of Monkhurst, Emily and Preece are finally together.