The Secret of Crickley Hall is a new take on the classic ghost story in the same way that his bestseller Once was a new take on the classic fairy tale. The Secret of Crickley Hall is set in a childrens home in a coastal town in England. Some of the children are persecuted by the people who run the home and have found places between the floors and walls of the home to avoid the adults. They can also spy, of course. One day there is a flash flood which sweeps through the town and the childrens home. All the children escape, except the kids in the wall.