A jade pendant allows modern woman Ai Yuan to travel back to the troubled times of the Republic of China. From hunger and cold on the streets of Peiping, to spy wars in the fog of Chongqing, to lonely watch in the isolation between the two sides of the Taiwan Strait, she used poetry as a blade and ancient books as a shield to guard the fire of civilization in the flames of war.
She witnessed Shen Muyuan's bloody sacrifice, struggled with Song Huaijin between mission and love, and even shouldered the reputation of "traitor" to complete a secret commission. In the end, this "recorder of the world" wrote "Footprints on both sides of the Taiwan Strait" in his lifetime, allowing the poems to span a hundred years and illuminate the suffering and perseverance of a nation.