Four interlinked adventures in time and space to mark Doctor Who's 45th anniversary, featuring the Seventh Doctor, Ace and Hex. In Egypt, archaeologist Howard Carter unearths an ancient secret buried in the Valley of the Kings. On an island of Mendolovinia, a deranged academic attempts to push back the frontiers of the human mind. In war-torn London, a cockney spiv takes possession of a bizarre alien object. And in a military bunker in the cold heart of Antarctica, the strangest and deadliest of the Doctor's many enemies lies in wait... In the blistering heat of the Egyptian desert Howard Carter and his team search for the lost tomb of Userhat, a servant of the god Amun. What they discover sheds new light on the history of the world as we know it.