The Pinehill Crest Hotel in Kent is host to three very different events: a cross-stitch convention, an experiment in time travel and... the summoning of the scourge. The Doctor, Bernice and Ace find themselves dealing with a dead body that's come back to life, a mystical symbol that possesses its host, and a threat from another universe that's ready for every trick the Doctor's got up his sleeve. This time, has the Doctor gone too far?