Set between World War III and The Empty Child.

Rose and the Doctor return to modern Earth and are drawn to the latest craze - the video game Death to the Mantodens. Is that so? Is she as harmless as she seems? And why do so many of the locals go on vacation and never return? Meanwhile, on another planet, a war rages. The Kyuvils must find a new way to attack the ruthless Mantoden. While exploring the galaxy in search of cunning, warlike, but trusting allies, they find the perfect soldiers - the Earth. Will Rose be able to save her family and friends from the alien threat? And will the Doctor be able to complete the game to the end and win?