Shark Rawley is a sailor aboard the tramp steamer Aurora , presided over by a brutal captain named Sanchez. While ashore one night, Shark and Sanchez encounter society girl Doris Selby and her friends on a slumming expedition at a dockside bar called the Wine Room. Entrapped by some of the predatory characters that infest the place, Doris escapes through a cellar only to abducted by Sanchez who then takes her to the Aurora . Arriving at the pier just as the ship is leaving, the Shark catches the vessel and, once aboard, battles the captain and crew for possession of Doris. In the ensuing fight, the Aurora catches fire and all hands are forced to abandon ship. The Shark saves Doris, and when the rescue ship finally reaches them, the pair have fallen in love.