A decade ago, a visitor crashed on a primitive alien world. Calling himself an emissary of the gods, he brought knowledge, technology, order and religion. Setting himself up as their leader, this mysterious High Priest has a long term plan. But his motivations change when a familiar face arrives in a familiar blue box.
While visiting her hometown in Australia, Tegan discovers her ex-boyfriend has gone missing. Searching for him leads the TARDIS to the planet Luparis, in a city modelled after Tudor London. They soon meet Queen Zafira, who chooses the Doctor as her newest husband.