As the grand investiture ceremony of the fictional dynasty approaches, Shen Zhiyi, a female official from a military family, accidentally discovers a bronze seal related to an old military grain case while organizing ceremony documents. To find out the truth, she sets out to investigate the secrets hidden by the seal. Song Ruyue, the daughter of a powerful official proficient in court rituals, gets to know her due to the ceremony affairs. The two cherish each other in the process of reviewing old files and checking seals. Lu Qinghe, a ritual official upholding public justice, provides full assistance to jointly unravel the dusty clues. As the ceremony approaches, the three use their talents and fearless resistance to restore the facts. On the way to seek family glory, Shen Zhiyi fully demonstrates the character of a military family. A group of young people stick to sincerity, trust, and fairness between responsibility and ideals.