Rose and the Doctor return to present-day Earth to visit Rose s mum, and become intrigued by the latest craze the video game, Death to Mantodeans. Is it as harmless as it seems? And why are so many local people going on holiday and never returning? find a new means of attacking the ruthless Mantodeans. Searching the galaxy for cunning, warlike but gullible allies, they find the ideal soldiers on Earth. can the Doctor play the game to the end and win?