A postmaster's daughter disguised herself as a man. While tracing a secret message that could subvert the imperial power, she discovered that the man behind the scenes was her most admired father.
Ye Zhao: Proficient in arithmetic and cryptography, calm and decisive, but deep down he admires his father and cannot accept the truth of his "treason".
Father Ye: An idealist who believed that imperial power was inefficient and attempted to use the information network to eclipse the emperor and achieve "rule without a king."
