Ace has never known the Doctor sowithdrawn and melancholic. He isavoiding her company, seekingsolace in the forgotten rooms andlabyrinthine passages of his ancienttime machine.Perhaps he will find the peace heyearns for on his favourite planet,Earth, in the second half of thetwentieth century - in the isolatedvillage of Crook Marsham, to beprecise, in 1968, the year of peace,love and understanding.But one by one the villagers arebeing killed. The Doctor has to act,but for once he seems helpless,indecisive, powerless.What are the signals from space that are bombarding the radio telescopeon the moor? What is thesignificance of the local legendsfrom the Civil War?And what is the aeons-old powerthat the Doctor is unable to resist?