When a group of soldiers decide to flee from the Napoleonic Wars, their journey home takes them through the Black Forest, leading them to a an ancient evil and a fight for their lives.

Great Britain. 150AD. When four messengers sent by Rome to a plague infected Caledonia, with a message of peace and help for their King, go missing Rome has no choice but to send ten of their finest across Hadrian's Wall to find and bring them back.