In wartime, codes and puzzles become a language of warfare. But if you can make a code, someone can break the code. Enter Velvalee Dickinson. She was a lover of costumed porcelain dolls and Japanese culture, and Velvalee was at the center of a truly bizarre doll-based mystery. During World War II, a team of female codebreakers investigated a series of letters from doll-lovers in the US sent to Argentina. The forged letters discussed prized dolls and their visits to doll hospitals. Turns out, the letters were coded messages from a doll-loving spy network.