Sue and her brother Eddie are exploring the historic sights of London, but their fun vacation quickly turns into a nightmare. While touring a gloomy, ancient prison tower, they somehow lose their tour group and end up completely alone. At first, they assume their guide will come right back for them. But as the sun sets and the massive wooden doors lock shut, panic sets in. You will be on the edge of your seat as the siblings navigate the freezing, echoing stone corridors in the pitch dark. Eerie sounds bounce off the walls, and a strange, shadowy figure begins to chase them through the prison. Get ready for a heart-pounding adventure as Sue and Eddie desperately search for an exit. They must use all their courage and quick thinking to escape the terrifying tower before the dark figure catches up to them.