Aunt Dee splits her candy shop between her niece Maggie and maple farmer Dex. Following letters Dee left, the two uncover the reason for her decision, during the Sweet Autumn festival.
Ballet star Petrov arranges to cross the Atlantic aboard the same ship as the dancer and musical star he's fallen for but barely knows. By the time the ocean liner reaches New York, a little white lie has churned through the rumour mill and turned into a hot gossip item—that the two celebrities are secretly married.
Sam and George strike gold in Alaska. George sends Sam to Seattle to bring George's fiancé back to Alaska. Sam finds she is already married, and returns instead with Angel. Sam, after trying to get George and Angel together, finally romances Angel, who, in the meantime, is busy fighting off the advances of George's younger brother, Billy.
Named after the World War II-era program, the plot revolves around a gifted high school student who decides to construct a nuclear bomb for a national science fair. The film's underlying theme involves the Cold War of the 1980s when government secrecy and mutually assured destruction were key political and military issues.