During the American Civil War

The coast of the southern states is largely blocked and trade in cotton collapses. A young merchant devises a plan to take advantage of this situation and make a profit.

The ship, called Dolphin, is specially designed for this purpose and is equipped with the latest technology and a selected crew, including Jenny Halliburt, dressed as a boy. Will she dissuade James from his greed for profit? And what are her servant's plans?