A field trip ignites Addie's desire to solve a centuries-old mystery: what happened to Lady Margaret Fraser? With the help of her older sisters Keedie and Nina, Addie begins her search for answers.

Addie and Audrey solidify their friendship when they go door to door to spread the word about the women who were wrongfully accused as witches. To heal the rift between her twin sisters, Addie plans a party for their upcoming birthday.

Despite Mr. MacIntosh's strict rules about using the town hall and Miss Murphy's attempts to shut it down, Addie’s birthday party for Nina and Keedie is a success. But when Addie's bully Emily crashes the party, things take a downward turn.

Keedie avoids her new friends out of fear they'll treat her differently if they know she has autism. Addie's fundraising campaign disrupts a beloved town event, which turns into the opportunity Miss Murphy needs to take control of the town council.

Addie's fate at her school is decided. Audrey and Frank discover the amazing story of Lady Margaret's escape, inspiring Addie to make one final plea to the town for a memorial for young women wrongfully accused as witches.

Addie’s memorial brings her more attention than she anticipated. A new adventure awaits Addie when she discovers an abandoned bookstore. Keedie makes the connection between an old friend and an online troll.

Keedie comes to the rescue when costumes are needed for the history tour. Audrey accepts a job helping Miriam. Bonnie visits, hoping to see some change, but insists that Juniper is the same as ever. Addie receives unexpected recognition.

With the Founders’ Day dance approaching, Addie must find a story from Juniper’s past that the town can all be proud of. Bonnie lets Addie know that she has a story that fits the bill. Nina struggles with her options for college.

The Founders’ Day dance takes Juniper back to 1944. Addie feels on top of the world but a well-meaning mistake threatens to undo all her good work.

Do Good Books is up for sale and Bonnie is banned from Juniper. But when Addie and her friends find a final clue for the mysterious safe there might be a way to save the shop... and Bonnie too.