Red Rising

The Institute's brutal war games culminate in Darrow's army, built by freeing enslaved students with House Minerva's standard and turning their loyalty toward him, sweeping through the remaining Houses. After trapping the Jackal (Adrius, ArchGovernor Nero Augustus's son and leader of House Pluto), who mutilates himself by cutting off his own hand to escape, the corrupt Proctors intervene to protect him and later kidnap Mustang in retaliation for Darrow's success. Enraged, Darrow kills the Proctor Apollo and leads his army in an assault on Olympus, the Proctors' base, using stolen anti-gravity boots. He frees Mustang and captures the Proctors who had been secretly helping the Jackal cheat.

Cassius, who had already discovered via a video from the Jackal that Darrow killed his brother Julian during the Passage, confronts Darrow directly. Rather than continuing the fight to the death, Cassius abdicates control of House Mars but declares an open blood feud against Darrow, setting up unfinished business between the two former friends. Around this same time, Darrow learns from Fitchner, House Mars's Proctor, that Mustang is in fact the Jackal's twin sister, and fears she may ultimately side with her brother. Instead, Mustang proves her loyalty by delivering the captured Jackal into Darrow's hands, and with all other Houses conquered, House Mars is declared the winner of the Institute.

With the competition won, ArchGovernor Nero Augustus approaches Darrow directly. He offers to sponsor Darrow's rise into the fleet-commanding Academy and further Gold society if Darrow will do two things: conceal the fact that Nero rigged the game in the Jackal's favor, and serve as his Lancer, a personal aide-de-camp. Darrow despises Nero, the very man who ordered his wife Eo's execution at the novel's start, but recognizes the offer as an unparalleled opportunity to burrow deeper into the heart of Gold power in order to eventually destroy it from within.

The novel closes with Darrow swallowing his hatred and accepting Nero's offer, publicly pledging himself to House Augustus as Nero's Lancer. His true identity as a Red, his loyalty to the Sons of Ares, and his long-term mission to dismantle the Society from the inside all remain intact and hidden beneath his new status as a rising star among the Golds.

Darrow au Andromedus enters Golden Son as a Red who has successfully infiltrated Gold society under a fabricated identity, his true origins known only to a small circle: his uncle Narol, the Sons of Ares rebels (led by Dancer), and the man who trained him. His motivation remains the memory of his wife Eo, publicly hanged by ArchGovernor Nero Augustus for singing a protest song after the two were caught in a restricted forest — Darrow faked his own death afterward to be recruited into the rebellion.

After being physically transformed into a Gold through an illegal "carving" and trained in Gold customs and combat, Darrow was placed in House Mars at the Institute, the elite proving ground where Society's young Golds compete for status. There he formed a close friendship with Cassius, not realizing he would later be forced to kill Cassius's brother Julian during the Institute's opening "Passage." He also discovered and was responsible for the death of Titus, another secretly-carved Red mole within House Mars, and earned the nickname "Reaper" for wielding a scythe in combat.

Over the course of the Institute's war games, Darrow built a powerful army by freeing enslaved fellow students, conquered rival Houses, and clashed repeatedly with the Jackal (Adrius au Augustus), the ruthless, self-mutilated son of Nero Augustus and leader of House Pluto. Cassius eventually learned that Darrow killed his brother Julian and nearly killed Darrow in a duel; Darrow survived thanks to Mustang (Virginia au Augustus), who rescued and hid him, and with whom he developed a romantic relationship. Cassius has since abdicated his House but sworn an open blood feud against Darrow — an unresolved threat heading into the next book.

A major reveal late in the book is that Mustang is actually the Jackal's twin sister; despite Darrow's fears of betrayal, she proved loyal and helped him capture her own brother. With House Mars's total victory, Darrow won the Institute outright. Fitchner, House Mars's Proctor and a secret ally, revealed that Nero Augustus had been bribing Proctors to ensure the Jackal's success — corruption Darrow now has leverage over. The book ends with Darrow agreeing to hide this corruption and become Nero Augustus's Lancer (personal aide), publicly aligning himself with House Augustus despite privately hating Nero as Eo's killer. Going into the next book, Darrow is deeply embedded among the Golds, tied to Nero and the Jackal's family, allied with Mustang, at odds with Cassius, and still secretly working toward the Sons of Ares' goal of dismantling the Society from within — all while concealing his true Red identity.