When his best friend is found dead in the street, Thomas Latimer suspects foul play. After all, the death comes dishearteningly close to Sean's latest discovery: a prophesy from the Ancient Celtic world. A prophesy that, until Sean's discovery of the ancient script in the back rooms of the British museum, had gone relatively unheard of since the Roman invasion of Britannia.

In the heat of summer and caught in London's famous, Victorian smog, Tom searches for the meaning behind his friend's death. What he finds sends him hurtling into a world he never knew, and never wanted to know, existed...