In 1945, American forces occupy Kronberg Castle near Frankfurt, home of the Hesse family and stacked with jewels, gold, and heirlooms tied to European royalty across generations. Within months, a fortune in gems vanishes, and the trail leads to a US Army officer and a Women's Army Corps captain conducting an affair inside the requisitioned castle. The film follows the investigation that unravels one of the largest thefts committed by American personnel during the occupation of Germany, tracing smuggled jewels through military postal routes and into pawn shops back in the United States. Interviews and archival documents lay out how the pair used their positions and access to move stolen property past customs meant to stop exactly this kind of looting. The case became a rare instance of US military justice actually catching up with soldiers who plundered defeated Germany, and the film uses court records and castle footage to reconstruct both the theft and the reckoning that followed.