Neil Oliver continues his epic story of how Britain and its people came to be. Diving for 3,000-year-old treasure and pot-holing through an ancient copper mine, he discovers how a golden age of bronze collapsed into social and economic crisis set against a period of sharp climate change and would eventually be replaced by a new era, of iron.

Neil encounters a celebrated warrior from 300 BC, owner of the finest Iron Age sword ever discovered. He tries his hand at divination in an effort to discover the power of Celtic priests and searches into his own DNA for clues to Celtic identity.

Continuing his epic story, Neil Oliver explores the remains of brutal Iron Age battles and Celtic rebellion as he reaches the moment when Celtic Britain was ripped apart by the world's great empire - Rome.