Much has been written about the so called 'barbarian' invasion between 300 and 500 AD that ultimately led to the Fall of the Roman Empire. Long before this, twelve thousand Celts crossed the Alps looking to conquer new lands. After treachery and murder, Rome dispatched four of her legions - twenty four thousand men - to confront the invaders on the 18th July 390BC. The battle took place next to a small river called Allia. This book follows both sides, the perilous journey the Celts made to get there and what the Romans did to provoke them in to battle. The story is set towards the end of the Bronze Age, so when a new stronger and lighter metal has been discovered men are prepared to steal and kill to possess the knowledge of how to make iron. We follow the son of one of the Romans sent to negotiate peace, and the small band of warriors, a druid and a necromancer sent by the Celts to pave the way for the main army.