In the bowels of the earth, there is a city of mummies! By imperial mandate, Princess Nefer must marry Thut. None of them wants marriage; Nefer because she craves freedom, and Thut because he is allergic to marriage. But the designs of the gods are irrevocable: Thut must marry Nefer in seven days and bring to the wedding the royal ring that Pharaoh has given him intact. In the meantime, on the surface of the earth, Lord Silvester Carnaby conducts an archaeological expedition and finds the Egyptian Royal wedding ring! Thut must now go to the human world to retrieve it. He is accompanied his 12-year-old brother, with his crocodile pet, and Nefer. Together they will live a great adventure in modern London and discover something that was not in their plans: falling in love.