Just after time travel, he became the only living male in Zhenbei Palace! The Zhenbei Palace is full of loyalists, and all eight brothers died in the battle. When the building was about to collapse, Xiao Chen, the frail ninth son, was ordered to take over the task at the critical moment. Entrusted by his grandmother, he took over the important task of guarding the palace and continuing the legacy of loyalty. He joins hands with his eight sisters-in-law, each with their own unique skills, to find out the truth behind the death of his father and brother in battle. He uses a special strategy to repel a hundred thousand barbarian troops and bring down the traitors in the court. From a frail young man despised by everyone, he counterattacks to become an iron-blooded lord guarding the northern border. He defends his family and country with his iron bones and his loyalty for hundreds of years!
