Tough Caribbean freighter Captain Sam Whelan engages Sally Clark, a tramp masquerading as a missionary's daughter, to care for an abandoned baby on board his ship. En route to New York, ships mate Gatson sexually attacks her. The Captain knocks Gatson overboard in an ensuing scuffle. A romance developing between the Captain and Miss Clark is put to the test in New York after an assault investigation uncovers the girl's questionable past.