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.