A meeting in a London bus with jewel thief Lady Christina takes a turn for the worst for the Doctor when the bus takes a detour to a desert-like planet, where the deadly Swarm awaits.
When the hospital she works at is transported to the moon, medical student Martha Jones joins forces with The Doctor to hunt down an alien fugitive before the oxygen runs out
It tells the story of Jem who can only think of her handsome youth pastor. When they start an affair, her chaste life is thrown into turmoil, jeopardizing her place in her family and the only world she's ever known.