Second century AD. From Antioch destroyed by the earthquake, Emperor Trajan sets out on his last campaign - to conquer the Parthian kingdom, the old enemy of invincible Rome. Meanwhile, the military tribune Gaius Ostorius Priscus, while excavating a destroyed building in Antioch, finds a weapons warehouse in the basement. There is no doubt - while Emperor Trajan is trying to take the capital of Parthia , behind his back an uprising against the Romans is being prepared. And the governor of Antioch, Andrian, will have to suppress the rebellion, pouring blood on its roots. And the veteran legionnaires of the Fifth Macedonian from the “Glorious Contubernius” - Gaius Priscus and his friends...