A river cruise through ancient desert lands will be an adventure in itself, think Philip, Dinah, Lucy-Ann and Jack. An adventure it certainly is, especially when Bill disappears and the children, along with Kiki the parrot, are trapped beneath a forgotten temple where no one has set foot for 7,000 years.
Why is everyone so afraid of the castle on the hill, and what dark secrets lurk inside its walls?
Philip, Dinah, Lucy-Ann, Jack and Kiki the parrot are on holiday in the countryside, staying on the side of Castle Hill. When flashing lights are seen in a distant tower, they decide to investigate - and discover a very sinister plot concealed within its hidden rooms and gloomy underground passages.
