Kate Grant comes from Canada. She is visiting Europe with her mother and father. One evening she sees two men in a museum. They are taking a very famous picture??Girl with a Pearl Ear-ring.? What can Kate do?

Holly and her brothers go to Barcelona for a football game. First, Holly wants to see famous places in the city, but her brothers want to go to a funfair. Then a man takes Holly?s bag, and the tickets for the game are in it!

It?s 1798. Sam Tinker and his daughter Jenny live in London. One day a thief puts a watch in Sam?s hand. ?Take this,? he says, and runs away. Two policemen see the watch and take Sam away. What can Jenny do? Can she help her father?

Tommy Grant is a taxi driver. One morning his boss telephones him. ?Can you be at the Ritz hotel at 9 o?clock?? he asks. The 12-year-old son of a film star is in London. His name is Dino. ?Be very nice to the boy,? Tommy?s boss says.

Joanna is a nurse for a Flying Doctor in north Australia. She accompanies a sick baby to Sydney and there she's offered a job at a hospital. It's her first time to visit a big city, and she loves it. Will Joanna stay in the big city or will she return home?

Hapu lives in Ancient Egypt. Hapu?s father is ill, but they haven?t got any money for a doctor. Hapu makes a beautiful necklace for Queen Cleopatra and takes it to her. But a guard says, ?Go home?. How can Hapu meet the Queen and get a doctor for his father?

Maisie King lives in the Bahamas. Her mother and father work at an Animal Hospital. Maisie has a new friend. His name is Ben and he?s a dolphin. Ben is very ill. Maisie helps him. Then Maisie has a big problem. Can Ben help her?

Marcel is a French mouse, and a detective. One evening, at the Louvre museum, he sees a man steal a famous painting ? the Mona Lisa. Marcel follows the thief to Venice and risks his life to get the painting back again.