56 y. e. Commander Corbulon concentrated a force of 20,000 men to wage war in Parthia. The second Praetorian cohort, commanded by veterans of the Cato Tribune and the centurion Macron, is ready for combat. However, support units, poorly equipped and poorly trained, are not. Corbulon's army can't perform before winter. However, the Parthians are already on the march. Warlord Hawk of the Desert attacked Rome's outposts. What is his purpose? And if he knows about the weakened state of the Roman troops, who provides this information?Katon goes on an intelligence mission to Parthia. Even inside his tiny band, a traitor may be hiding.. Death seems almost inevitable.... But at least Cato left his old comrade Macron in the safety of the garrison. At least, he thinks so... For Macron, too, faces an unexpected test that will test his courage and experience to the limit.