In the twenty-seventh year of the Jiajing reign, sunset often stains the vermilion walls of the Hall of Purple Radiance, but it cannot conceal the surging undercurrents beneath the imperial court. The emperor, Jiajing, is obsessed with cultivating immortality. Under the guise of alchemy, he manipulates the balance of power, pulling the Yan faction and the upright officials back and forth. Beyond the borders, the Tatars threaten the passes, Japanese pirates raid the coast, and the Southeast Asian tributary system teeters on the brink of collapse. Geopolitical flames and court intrigue spread together.
A prediction from the Imperial Astronomical Bureau, “Mars guards the Heart,” shatters the calm on the surface. Shen Qingci, daughter of a retired censor, assumes a false identity and infiltrates the bureau to uncover the truth behind her father's disappearance. There, she unexpectedly unlocks the Secret Star Almanac left behind by Liu Bowen in the early Ming dynasty, revealing the cryptic prophecy: “Heaven's Mandate returns to the Ming, yet the inner rot brings cause for concern.” The Yan faction exploits the prophecy to build influence, the upright officials take popular support as their shield, Prince Yu conceals his sharp edge, and a mysterious Daoist alchemist comes and goes without a trace. But this so-called “Mandate of Heaven” is nothing more than imperial power, a pretext for ministers to plot treason, and the people's longing for peace and stability.
From palace intrigue within the capital's walls to bloody battles at the border, from Japanese pirate hideouts in the southeast to misty ancient temples in Jiangnan, Shen Qingci navigates between astrology and human nature, choosing between power and justice. As the “cancer” of the Yan faction's corruption connects with the black market network of Japanese pirate smuggling, as the prophecy of Heaven's Mandate collides with geopolitical struggles, and as Jiajing's imperial schemes meet the ultimate truth that “Heaven's Mandate is the people's will,” a game of strategy concerning the fate of the Great Ming quietly begins beneath a land bathed in the glow of sunset.