Three US sailors aboard a decoy ship fight German U-boats in World War I and try to win Sally who works on the Coney Island midway. Three US sailors aboard a decoy ship fight German U-boats in World War I and try to win Sally who works on the Coney Island midway. Three US sailors aboard a decoy ship fight German U-boats in World War I and try to win Sally who works on the Coney Island midway. Three US sailors aboard a decoy ship fight German U-boats in World War I and try to win Sally who works on the Coney Island midway.