The fourth installment in the 'Tad Jones' saga. Tad and Sara are now parents to Olympia (Oli), an adorable and intrepid two-year-old girl. And Mummy isn't taking it well that he's no longer the center of attention. While on vacation in London, Sara follows the trail to a unique object: the magic lamp from One Thousand and One Nights. And Mummy, consumed by jealousy, makes a wish: to travel back in time to when he was young and everyone loved him. Tad and Sara must join forces to prevent Mummy from changing the course of history and bring the group (including Jeff, Belzoni, and Ramona) back home to their own time. This new adventure will take them across the Atlantic Ocean from Peru to Greece, and from there to the heart of the Middle East, to the very cave of Ali Baba and the Forty Thieves.