Heavenly Tyrant

The second installment in the Iron Widow series picks up immediately after the first book, set in a futuristic world inspired by Chinese history where humanity fights giant alien creatures called Hunduns using piloted mechas known as Chrysalises, powered by a mystical energy called qi and constructed from spirit metal harvested from Hundun remains.

A prologue set over two centuries earlier introduces Qin Zheng, the legendary pilot who unified seven warring nations into the empire of Huaxia. Dying of an aggressive plague called flowerpox after defying the mysterious gods who orbit the planet in a structure called the Heavenly Court, Qin Zheng is frozen in time inside the Yellow Dragon, the most powerful Chrysalis, by his mentor Mi Xuan, a Queen-General who held both military command and royal authority. He awakens 221 years later to find everyone he knew is dead and the egalitarian society he built has been dismantled.

The main narrative follows Wu Zetian, an 18-year-old who co-pilots the Yellow Dragon with Qin Zheng. Having destroyed Huaxia's corrupt ruling council in the previous book, Zetian now flies westward after receiving a threatening message from the gods. In their shared mental pilot link, called the yin-yang realm, Qin Zheng reveals he once halted tribute to the gods and suspects they retaliated with flowerpox. Zetian confronts him with truths she recently learned: The Hunduns are native to their planet, humans are the invaders, and the gods sustain the war for their own benefit. Qin Zheng insists this must remain suppressed and threatens to kill her if she reveals it. When her partner Gao Yizhi warns that pilots Liu Che and Wei Zifu are flying the Azure Dragon, another Chrysalis, toward the capital, Zetian races back.

The battle pushes Zetian past her limits. Qin Zheng takes control and separates a smaller humanoid subunit from the Yellow Dragon's head, a technique unknown to modern pilots, pinning the Azure Dragon down. Zetian realizes she did not need to destroy the entire Palace of Sages; Qin Zheng admits he withheld the technique to test how far she would go. She attacks him in the yin-yang realm, and he tears out her spirit form's spine, rendering her unconscious.

Zetian wakes three days later shackled in the Huaxia Palace, stripped of her armor, her feet surgically unbound without her consent. Qin Zheng has reclaimed his throne, appointed Yizhi as Imperial Secretary, and intends to marry Zetian as political necessity. He reveals his ideology of laborism, centered on ending the exploitation of labor. He plans to nationalize banks and health care, guarantee basic sustenance, open education to women, and ban foot-binding. Zetian is stunned by how easily he decrees changes she dreamed of, yet he confiscates her devices and confines her.

After a hunger strike and a failed assassination attempt by Liu Che, Qin Zheng formally decrees Zetian as empress and returns her spirit armor. Shangguan Wan'er, the maidservant assigned to Zetian, introduces her to laborist political theory. Qin Zheng molds Yellow Dragon armor onto Zetian, but it functions as a cage only he can unlock. He reveals the erased history of the Iron Widows, powerful female commanding pilots from his era who were executed after his disappearance, and begins training her.

At the coronation, Qin Zheng delivers a revolutionary speech but collapses coughing blood. Doctor Hua Tuo diagnoses him with opportunistic infections caused by his outdated immune system and orders indefinite quarantine. A glass chamber in the throne room becomes his prison. Through dream links established via spirit metal, Qin Zheng continues training Zetian, and they secretly plan an assault on the Heavenly Court, which his calculations reveal to be an artificial space station. Meanwhile, Sima Yi, who escaped Zetian's earlier assault on the old command structure, reveals himself as the gods' envoy and demonstrates their surveillance by playing recordings of Zetian's private conversations.

Former chief strategist Zhuge Liang broadcasts denunciations of Zetian, and reactionaries leak footage of the coronation collapse. Zetian travels to the Han frontier for her first solo battles, where she discovers the Hunduns cease attacking when they sense she does not wish to kill them. Qin Zheng then extends conscription to girls with sufficient spirit pressure, the innate power level required to pilot a Chrysalis. Zetian presents the newly conscripted female pilots, haunted by guilt over sending them into a war based on lies.

Under pressure to produce an heir, Zetian proposes faking a pregnancy while secretly recruiting Yizhi's sister Taiping to calculate the trajectory to intercept the Heavenly Court. Zetian also founds the Phoenix Alliance, an organization supporting women and girls, delivering a landmark speech about domestic violence and gender inequality. Through dream-link memories, Zetian then discovers that Yizhi conspired with Qin Zheng and Sima Yi to harvest her eggs without her knowledge and implant them in a surrogate. A real baby is growing, making Zetian a mother against her will.

Liu Che leads a military insurrection from the frontier, joined by Zhuge Liang. Zetian takes command of the Yellow Dragon alone for the first time and battles the Azure Dragon until both Chrysalises crash. The gods then expose Yizhi's deepest deception: He manipulated Doctor Hua into fabricating Qin Zheng's immune deficiency, deliberately infecting him so the quarantine would seem necessary. Yizhi incapacitates Zetian and Qin Zheng with nerve gas, tells them to blame everything on him, and vanishes. Freed from quarantine, Qin Zheng channels his fury into governance while Zetian negotiates the appointment of Wan'er as Imperial Secretary and Taiping as Minister of Finance, the first women in the central court in two centuries.

Zetian and Qin Zheng launch the Yellow Dragon from Mount Ziwei on Taiping's calculated trajectory, burning through spirit metal as fuel to escape the planet's gravity. They crash into the Heavenly Court and discover an advanced human civilization called the Melian Republic. The gods are ordinary humans who control trade in spirit metal, which they call orichalite, maintaining the war to keep supply flowing. Yizhi, extracted to the station months earlier, reveals that humans were originally deposited on the planet as prisoners by various galactic powers.

The Melians deploy Li Shimin, Zetian's former co-pilot and love from the first book, against her. Rebuilt with mechanical parts and embedded spirit metal, Shimin speaks manufactured accusations through an artificial device. Zetian drives her sword through his heart but discovers his spirit persists in fragments of his former Chrysalis, the Vermilion Bird, stored on the station. She and Qin Zheng commandeer the Hive Queen, the fleet's largest ship, and destroy the station. Zetian then stabs Qin Zheng in the heart, declaring she can never be free while he lives. He survives by using spirit metal to pump his blood and retakes the ship, while Zetian, Yizhi, and Helan, a Melian of mixed Huaxia heritage recruited by Yizhi as an ally who helped them access the station, flee in a smaller vessel.

As they plummet through the atmosphere, the Vermilion Bird's fragments reassemble and rescue them. On a foreign beach, a winged humanoid figure of pure spirit metal emerges from the Vermilion Bird. When Zetian asks if it is Shimin, the figure responds with his voice, calling her by her intimate name. In an epilogue from Qin Zheng's perspective, he recovers in Chang'an, having announced to Huaxia that the gods were human subjugators. He plots to recapture Zetian by holding Wan'er and Taiping hostage, while a Melian military fleet approaches, expected in approximately six months.