Jenna Strange is in trouble. Again. After being suspended from school for the third time and scaring off yet another housekeeper, she's being subjected to the worst punishment any rebellious 13-year-old can imagine - spending the weekend with her parents and her perfect sister. At the Wayfarer Inn, Jenna looks for new ways to cause trouble until she meets a group of young misfits who travel there every Halloween to read the Secret Letters, a collection of ghost stories left behind by visitors since it was built. When Jenna inadvertently discovers a letter that contains a 250-year old mystery, they set out to locate Blackbeard's lost treasure. Together, they must brave deadly riddles, escape a dangerous madman, face Blackbeard's ghost, and discover there is more to the legend of the infamous pirate than History tells.