The Doctor and Romana head for Calufrax in search of the second segment of
the all-powerful Key to Time. But something blocks their attempts to
materialise on the barren, ice-covered planet. When the TARDIS does materialise
it is not on Calufrax but on the affluent world of Zanak, controlled by the
Captain's harsh regime.
What is the secret behind Zanak's bountiful mines and its unseen leader? Who
is really pulling the strings among the planet's rulers? What happened to
Calufrax, and where is the second segment?
The Doctor, Romana and K9 must battle the ghost of a tyrant ruler from the
past and stop Earth becoming the next victim of Zanak - the Pirate Planet!