After arriving back in Britain from Venice Sir Percival and I are sent into hiding by the secret Government Department we work for. Rumours have reached them that our lives are in even more danger from the Men of the Cog after destroying their experimental cold-aether apparatus.The secret house we are sent to is located in a remote village in the midst of the Snowdonia mountains of North Wales. In this splendid isolation Sir Percival has been instructed to recreate from his memory the machinery we most recently destroyed.However, mysterious, violent deaths plague the village, for which we receive the blame as our arrival apparently woke the monster.But the reality is far more inexplicable than we'd ever imagined.