As she cleans up the cottage her mother left behind, Clara Hannigan discovers a locked hope chest. Inside is a book that might have the answers to her questions... if she can connect the dots between her mom and a prominent local. Complicating matters is one of Clara's students: a mean girl who has a bone to pick with the Hannigans. Meanwhile, Clara's oldest sister, Kate, is ready to take her romance to the next level. She could have everything she wants by Thanksgiving, until her boyfriend's daughter is implicated in Birch Harbor High School drama... and it has nothing to do with theatre club. Amelia is ready to open her new business to locals and tourists. But that means she must finally bury the search for her father. It would be easy, if one of her sisters didn't show up with an old yearbook and a new interest in the case. Megan is in the throes of fixing her life. With a new career and a new home, all she needs now is to ensure her teenage daughter will fit in at the local high school. But when Megan expects special treatment from the familiar staff at B.H.H.S., her fresh start is compromised and rumors begin to spread.