In a distant galaxy, a spaceship hurtles out of control towards a boiling sun with the Doctor and Martha trapped on board. They've only got 42 minutes to uncover the saboteurs, but, with a mysterious force starting to possess the ship's crew, the Doctor is running out of time.
The TARDIS lands on a spaceship, in a distant galaxy, but the spaceship is out of control and falling into a nearby sun! A mysterious entity is possessing the ship's crew, with deadly consequences. The Doctor and Martha only have 42 minutes to save the ship, its crew and themselves!