Rich and blessed is the oasis of the Syrian Desert - Palmyra, lying at the crossroads of the caravan routes. But the fate of the kingdom, caught in the field of attraction of two powerful empires, is unenviable: a battle is brewing here between Parthia and Rome. It seems that the elderly ruler Vabat is unable to hold the reins of power, and a rebellion breaks out in Palmyra, fanned by its Parthian neighbors. Who can you rely on if one son of the ruler turns out to be a traitor-rebel, another is a flighty reveler, and the third is a complete fool? But the alarm signal had already reached Rome, and faithful comrades, the centurions Cato and Macro, led their soldiers to help the ruler’s garrison locked in the citadel of Palmyra... Will they make it in time?