- The Doctor faces the end of his life as the Master's plans hurtle out of control. With the sound of drums growing louder, and an ancient trap closing around the Earth, the Doctor and Wilf must fight alone. But sacrifices must be made, and the deadly prophecy warns: "He will knock four times."
- 故事产生在不同于实际的异世界中。在这个世界中,所有的人类均拥有被称为守护精灵的动物伙伴,这些动物是人类灵魂的具象暗示。女主角莱拉·贝拉奎亚发展于英国牛津的约旦学院。在她前往伦敦寻觅掉落的同伙罗杰的进程傍边,莱拉发明一系列儿童掉落事务与神秘物质尘埃有所接洽关系。跟着故事展开,她还发了然触及到阿斯瑞尔勋爵和玛莉莎·库尔特的…