Mark is a young British sailor who is deployed to Antioch in Syria as part of a delegation to brief the Emperor Diocletian on the liberation of Britain from a usurper. By coincidence, he meets the Tribune Constantine who introduces him to a fellow Roman Army officer, George. Mark can write in Latin so George appoints him as his clerk.
Mark is tasked to keep an account of the operations of the 'special forces' unit that George commands on the front...