 The Doctor takes Ace back to the London district of Perivale where she grew up. Thinking that his young friend wanted to visit her former home which he discovers to be quite the contrary. For Perivale Is hardly the most exciting place in the world. Or at least it didn t used to be. As the duo discover when they are informed of a spate of mysterious disappearances that have recently taken place in the last few weeks. Some of which are old friends that Ace grew up with. Intruiged, the Doctor endeavors to uncover the mystery behind the disappearances. But as the Doctor s curiosity has pr oven many times before. It throws himself and Ace in to and a whole heap of danger. Finding themselves transported to another world and accompanied by a insufferable survival/self defense expert by the name of Sgt. Patterson. They must learn to work together with the help of Ace s old friends from Perivale who have also been transported to the alien planet. Hunted by a race of Cheetah people who use Cat like creatures called Kitlings who bring them their prey from Earth. The gang struggle to survive as the Doctor struggles to find a way to get them all home. But as Ace discovers. Trying to survive is the very least of their problems as the Cheetah people have an alluring and dangerously seductive side to them. And a connection to the planet that is more than just physical. It s spiritual. While the Doctor learns. There s another even more menacing threat lurking in the shadows. One from his past with an old score to settle with the wily Time Traveller. One that might be finally settled on the dessert plains of the alien world the Cheetah People.