By chance or fate - or maybe something else - two young, imaginative strangers become cross-country pen pals in the spring of 1964. Through the course of their nine-year correspondence, Fenn Rainbow Crispus-Wellsby and Zorro Anderson grow from shy middle-schoolers to adventurous young adults, sharing tales of family, friends, secrets, travels, troubles, triumphs - and a lonely pet pterodactyl. As Zorro's letters grow longer and increasingly fantastical, Fenn seems to play along with supernatural stories of her own. How much is true? Will they ever meet in person? What do Guam, sharks and Paul Simon have to do with everything? All the answers are in the mail.