The Darrow sisters' sleepover turns chaotic when Bonnie seeks to disrupt their perfect image. Addie uncovers a WWII code-breaking story linked to Verity Loveday, raising questions of truth and loyalty.

Addie seeks confirmation of the Codebreakers story for the Founders’ Day event. Miriam's reluctance gives way to a touching revelation.

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.