Their magic tree house takes Jack and Annie back to retrieve a lost story in ancient Greece, where they witness the original Olympic games and are surprised to find what girls of the time were not allowed to do.
The Mystery Girl, with Mimi, Papa, Christina and Grant aboard, travels to the historic country of Greece and the wonders of the ancient world soon turn to a wickedly awful mystery.
After her grandfather's death, eight-year-old Sophia fulfills his last request and journeys to Greece with her mother to see the land where her roots are.