As World War II begins and the U.S. Navy sets up shop in San Juan, Puerto Rico, the local elite decide to throw a final party at a casino that's being converted to a military base. There, government worker Jose Manuel announces he's breaking off his engagement to Rita, a woman he doesn't love who comes from a rich family. But when his father is framed for treason against the Americans, Jose must reconsider marrying Rita, who has powerful political connections.