The Doctor, after experiencing a series of curious encounters, manages to find Jamie and Zoe. He soon deduces that they are in a world filled with fictional and mythological characters. They finally meet a person called "The Master" who seems to be in charge. It turns out that he is in fact an Earth man abducted and brought to the land of fiction in order to provide creative energies for the unseen aliens who are really in charge. Everything that the Doctor has experienced was a series of tests to prepare him for his role as replacement. The aliens' plan is to control everyone on Earth and bring them to the land of fiction, leaving the Earth itself empty for easy colonisation.