1949. Just before the most important and brutal battle of Chinese civil war, an elite small group of PLA commandos infiltrated across the Yang-tze river into the heart of KMT regime. Other than fighting behind enemy lines, the captain of the group had one special task: turning an official who served loyally in KMT army - his own brother.

Once celebrated as a prodigy, Yang Qianhuan, the third disciple of the Imperial Observatory, is cast into obscurity with the rise of Xu Qi'an. Despite being told that his fate is sealed, he refuses to surrender, determined to defy destiny and reclaim his place through his own strength.