It's the story of four children: Julian aged 12 , Gorge aged 11 ( short for Georgina because she would like to be a boy ) ,Dick aged 11 and Anne aged 10 and a dog, Timmy. They find a secret passage that goes from Kirrin cottage to Kirrin farm. The children have a tutor - Mr Ronald. A few days later the children' s uncle sees that three pages of his extremely important plans for his new invention have disappeared...All Rights Reserved