When Jessie searches for her ill grandmother's missing charm bracelet, she is led to a magical world and finds she has a reason and right to be there.

Princess Serena, who wants to be a knight instead of a princess, must perform good deeds on a Quest of Kindness to prove to her father that she deserves to go to knight school.

Their magic tree house takes Jack and Annie back to a monastery in medieval Ireland, where they try to retrieve a lost book while being menaced by Viking raiders.

The magic tree house transports Jack and Annie to the deck of the Titanic to find the mysterious gift that will free a small dog from a magic spell.

The magic tree house is back with a message from Morgan le Fay telling Jack and Annie to seek out "The Gray Ghost" and listen to her story, and immediately they are whisked away to Nepal where they meet Tenzin, a climber who has recently lost his family, and who takes them up the mountain to meet a snow leopard and renew himself.