Vacationing on historic Nantucket Island, a teenage mystery writer and her friends must outwit two scheming thieves to solve the secret behind a legendary ghost story.
| Actor | Role |
|---|---|
 Bailee MadisonAnnabelle Hooper | Annabelle Hooper |
 Robert CapronJake McFeeley | Jake McFeeley |
 Mavrick MorenoBilly Caufield | Billy Caufield |
 Juliana HarkavyLillian Caulfield | Lillian Caulfield |
 Gary WeeksBurt Hooper | Burt Hooper |
 Whitney GoinMeredith Hooper | Meredith Hooper |
 Rachel ResheffMaddi McFeeley | Maddi McFeeley |
| KKevin B. McGlynnArgyle | Argyle |
 Jamison SternTweed | Tweed |
 Mia MatthewsPrentice Beadle | Prentice Beadle |
| BBianca MatthewsPhoebe Beadle | Phoebe Beadle |
 Wally Marzano-LesnevichSilas Grimm | Silas Grimm |
 Chuck SlavinPolice Chief | Police Chief |
| JJohn H. CopenhaverOld Salt | Old Salt |