After a demonstration of new PT boats, navy brass are still unconvinced of their viability in combat, leaving Lt. "Rusty" Ryan frustrated. After the attack on Pearl Harbor, however, Ryan and his buddy Lt. Brickley are told they can finally take their squadron into battle. The PT boats quickly prove their worth, successfully shooting down Japanese planes, relaying messages between islands, and picking off a multitude of enemy ships.
A waitress at the Warner Brothers commissary is anxious to break into pictures. She thinks her big break may have arrived when actors Jack Carson and Dennis Morgan agree to help her.
Kit Madden is traveling to Hollywood, where her best-selling novel is to be filmed. Aboard the train, she encounters Marines Rusty and Dink, who don't know she is the author of the famous book, and who don't think much of the ideas it proposes. She and Rusty are greatly attracted, but she doesn't know how to deal with his disdain for the book's author.
