In an old, abandoned house, the Weeping Angels wait. When people start disappearing, a young woman finds cryptic messages from 1969 - messages from a mysterious stranger called the Doctor. Can she decipher them before the Angels claim their prize?
The Shepherd seems to be targeting the patients of a psychiatrist. But why?
As the team investigates the arson case, they wonder if "the Shepherd" is a person's true identity or part of a mentally ill woman's imagination.
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