Yzabeth Anderson-Nichols grew up hearing her father Zorro Anderson's many fantastical stories – among them the tales of a legendary correspondence with his childhood pen pal Fenn Crispus-Wellsby. After Zorro's passing, Yzabeth mails a letter to Fenn and receives an unexpected response that opens doors to new mysteries, friendships and discoveries from the California shoreline to the Connecticut swamp – as the strange case of a vanished family could unearth secrets from everyone's past.