Landing in Alaska, the Doctor and Nyssa encounter a group of people in a most unusual house, cut off not only by the harsh climate but by their individual secrets and obsessions.
Millionaire Shaun Brett is utilizing chunks of the local area to construct a shrine to his dead father. But when deadly creatures start roaming outside, and a terrifying discovery is made inside the house, the Doctor realizes that Brett has unleashed an unimaginably ancient force.
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