内容简介：
It all begins as an innocent adventure, a challenge to explore the cellars of a row of terraced houses, when three intrepid children--known as the Trio Theo--enter a connecting trap door situated in the walls of the basement. Fantasy and mischief turn into an experience of fear and terror as the three find themselves confronting the horrors of the past, through their efforts to release the ghost children, alone and trapped for eternity by the evil power of 'the man in black ' Their first encounter with the supernatural is when they emerge from the cellars to the caves and hovels under the street and discover the wartime ghost orphans, who warn the trio of the perils of the faraway land and its occupants. The book is based on local myths, rumours and history from North Wales.