The TARDIS makes an unplanned landing on Manussa, where preparations are underway to celebrate the defeat of the Sumaran Empire five centuries earlier. But the ancient evil of the Mara lives on, and Tegan, who has been haunted by disturbing dreams since her time under the wind chimes on Deva Loka, is now a pawn in its plan to re-enter the physical world and subjugate the Manussan people.

Only the Doctor can stop the Mara – but first he must convince the authorities that he is not just a deluded fool who believes in children’s fairytales…