Arriving on the almost impossibly ancient planet of Hyspero, a world where magic and danger walk hand in hand, the Doctor and Sam are caught up in a bizarre struggle for survival.Hyspero has been ruled for thousands of years by the Scarlet Empresses, creatures of dangerous powers -- powers that a member of the Doctor's own race is keen to possess herself; the eccentric time traveler and philanderer Iris Wildthyme.The Doctor and Sam themselves must escape the clutches of the dying Scarlet Empress, and they encounter many strange creatures on their travels -- bearded ladies, humanoid mock turtles, transvestite cyborgs and many more -- but in a land where the magical is possible, is anything really as it seems?