Nightclub singer/evangelist Reno Sweeney is en route from New York to England aboard the ocean liner S. S. American. Her pal, Billy Crocker, has stowed away to be near his love, Hope Harcourt. The problem is Hope is engaged to the wealthy Lord Evelyn Oakleigh. Joining this love triangle is Public Enemy #13, Moonface Martin.
With the help of some elaborate disguises, tap-dancing sailors, and good old-fashioned blackmail, Reno and Martin help Billy in his quest to win Hope’s heart.