Jack and Annie travel back in time to Egypt and meet Florence Nightingale, who is on the trip that will influence her life and the decisions that will make her famous.
Jack and Annie travel back to nineteenth-century Ireland to inspire a young Augusta Gregory to share her love of Irish legends and folktales with the world.
In their magic treehouse, Jack and Annie are again transported to King Arthur's realm, where invisible beings, giant ravens, and mistaken magic spells have a duke's castle in an uproar on Halloween night.