It would take a special man to survive going back in time to medieval Gloucestershire; Philip Carmichael is that special man.
Philip Carmichael has extraordinary talents but he is not yet aware of them. While spelunking in Deepwell, he falls to an undiscovered cavern and finds alien remains. He searches the body and removes two strange bracelets. Squinting against a sudden flash, a searing pain rushes through him and Philip disappears.
He awakes in the 11th century bewildered and sees that the alien is barely alive. It touches his mind and attempts to inform Philip what has happened. While he struggles to understand the alien’s meanings, it dies. Its spirit bonds with Philip, slowly bringing forth his hidden abilities.
Philip establishes a camp in the cavern and realises he can manufacture exceptional merchandise incorporating alien materials. He sets out on a path of discovery when introducing himself and his goods to the medieval populace of Gloucestershire. The spirit guides and assists Philip with all tasks, giving him the belief he will find a means to return to the 20th century.
Philip never enquires of the spirit why it has arrived on Earth; the thought to do so fades from his mind when close to the body. In fact, the alien spirit has its own agenda; an agenda involving the expected one.