This true story follows Elizebeth Friedman, a brilliant young woman in the early 1900s who loves poetry but stumbles into the secret world of codebreaking. Alongside her husband William, she helps catch gangsters during Prohibition and, during World War II, becomes America's secret weapon against Nazi spies in South America. Using her sharp mind for patterns and language, she cracks complex enemy codes without a single weapon, proving that intelligence and perseverance can be just as powerful as physical force.