The arrival of the TARDIS in 15th century Mexico leads the crew to the doomed Aztec people, a mixture of high culture and brutal savagery. Matters are further complicated when Barbara is mistaken for a god and the Doctor becomes engaged to be married.

The arrival of the TARDIS in 15th century Mexico leads the crew to the doomed Aztec people, a mixture of high culture and brutal savagery. Matters are further complicated when Barbara is mistaken for a god andthe Doctor becomes engaged to be married.