Jefri Olsndot and Amdiranifani endure confinement under Steel’s stone dome, worried about failing coldsleep systems and nearby combat. When voice contact with Ravna signals her imminent arrival, their anxiety briefly eases. Amdi’s restless exploration leads him to break through loose mortar and discover a hidden tunnel network within the dome’s walls. He reaches an exterior observation point and sees the smoky battlefield before scrambling back as Tyrathect arrives.

Tyrathect questions Amdi about climbing in the walls but chooses not to report the discovery. When Ravna’s radio call comes, Tyrathect answers using the alias Mr. Skinner, claiming to speak for Steel. Ravna tests them with a math question; Amdi responds correctly with the volume of a sphere. Tyrathect presses for a courtyard landing, but Pham refuses and demands only guidance to distinguish friendlies from enemies.

Steel enters and takes control of the communication, displacing Tyrathect. Aboard the orbiting ship, Ravna urges Pham toward decisive action despite his deep mistrust. Pham reluctantly summons Blueshell to pilot the landing craft when he realizes he cannot manage its unstable manual controls alone. Blueshell wrestles the craft downward while Pham prepares to use the beam weapon.

As Pham begins strafing enemy positions through breaks in the smoke, Johanna Olsndot moves into open ground near the castle, attempting to signal the spacers. Her appearance draws arrow fire from the ramparts and a rush of Woodcarver’s protective troops, creating confusion in targeting. Pham recognizes the human figure, immediately ceases fire, and orders Blueshell to land.

Steel attempts to explain Johanna’s presence as Woodcarver’s deception, but Pham privately identifies Steel as the true killer while recognizing they still need access to the refugee ship. Tyrathect escorts the children into torchlit interior tunnels and, when challenged by Jefri, reveals he is acting without Steel’s knowledge. He tells Jefri that Johanna lives and that Steel killed their parents, supporting his claims by relaying communications showing Steel’s threats and planned betrayal of the spacers.

Jefri agrees to use the secret wall passages only if Tyrathect continues relaying Steel’s communications and guides them to usable exits. Tyrathect deceives Steel with a false report of a ceiling collapse to buy time, then warns the children that oil can be poured into the passages, making speed critical.

As Steel delays producing Jefri, the lander observes troops spreading around the castle perimeter and oil being positioned on the walls. Peregrine broadcasts warnings via loudspeaker, prompting Steel to threaten torture against Jefri if Woodcarver’s forces do not withdraw. Woodcarver’s artillery ceases temporarily in response.

Steel commits to desperate measures, ordering the oil barriers ignited, then moves to sabotage the refugee ship with explosives built into the dome structure. He finds the Flenser Fragment waiting near the fuses. The Fragment claims to have saved the children and prevented the ship’s destruction, believing this will win its survival. Steel realizes the Fragment’s psychology has been fundamentally altered by the Tyrathect merge. They attack each other.

Jefri and Amdi race upward through the wall tunnels as oil begins filling the passages from below. Jefri becomes wedged in the narrow exit passage, removes his jacket, and uses oil from Amdi’s soaked fur as lubricant to squeeze through. Once out, he drags the oil-covered puppies to safety. They emerge to find Steel’s forces separated from them by a pool of burning oil along the castle base.

The landing craft suffers a low-speed crash that jams the beam weapon, forcing Pham to improvise. Blueshell abandons the craft to attempt a direct rescue on his wheeled skrode while Pham advances on foot with Johanna and Peregrine. Pham uses a concealed pistol to suppress Steel’s charging forces without igniting the surrounding oil. Blueshell reaches the children and shields Jefri and the oil-soaked Amdi under protective cloth, rolling them through the flames to safety—but his own body catches fire during the passage. When the skrode stops, Blueshell is dead, his fronds burned away and his stalk burst.

Johanna rushes forward and finds Jefri alive. Peregrine performs emergency aid on the disoriented Amdi as the Flenserist forces retreat northward. Pham, driven by godshatter urgency despite the emotional weight of Blueshell’s death, pushes immediately to breach the dome and access the countermeasure while the Blight fleet continues its approach. The chapter concludes with two intercepted galactic network messages: one announcing the fall of a major civilization to the Blight, another urging scientific observation of the crisis.

Ravna walks across the burned hillside to meet with Woodcarver’s commanders. Woodcarver explains that Steel had placed explosives throughout the dome, but someone stopped him mid-sabotage—two of Steel’s members are dead, the survivors a broken remnant. Woodcarver suspects the saboteur was Flenser, who also orchestrated the coordinated retreat of Steel’s forces.

Ravna enters the refugee ship and reunites with Jefri, discovering that the voice she thought was his had often been Amdi mimicking him. She finds Pham in the cargo hold, merged with a luminous, writhing structure—the activated countermeasure—in a fugue-like computational state while Peregrine guards against interruption.

Pham explains he is coordinating the countermeasure to trigger a reverse surge in the Zone boundary, temporarily elevating their local region into a higher Zone to draw enormous power. Across the region, the sun’s light fades to near darkness despite clear skies as the maneuver draws stellar energy, causing widespread terror among the Tines.

Something vastly powerful beyond the Powers has responded to the countermeasure’s signal, creating a surge that will push the Slowness boundary outward thousands of light-years, trapping the Blight fleet permanently at their current distance and possibly destroying the Blight itself. The countermeasure then suddenly contracts. In his final moments, Pham realizes his memories of Canberra, the Qeng Ho, and his entire life are genuine—not fabrications of Old One’s godshatter. He tries to tell Ravna he is real, but dies before he can speak. The countermeasure collapses into dark, inert matter fused with his body.

Jefri and Johanna arrive as the interior lights activate and find Pham’s remains merged with the dead artifact. Ravna’s dataset confirms they are now deep in the Slow Zone with the Blight fleet stranded at safe distance. She sits with the body for much of the afternoon, in shock and grief.

Peace settles over the former Flenserist territory. Twenty days after the battle, a pack carrying a truce banner appears on the northern ridgeline. Woodcarver, Ravna, and Peregrine meet with Flenser on a hillside terrace. Wounded, his body showing damage from the radio cloaks, Flenser claims to be both himself and Tyrathect, with the teacher’s personality having won their internal struggle. He negotiates a monitored peace, ceding Hidden Island and Starship Hill to Woodcarver and agreeing to observation. After tense bargaining, Woodcarver reluctantly grants his request for custody of Steel’s broken remnant.

Peregrine becomes pilot of the landing craft and ferries Ravna and Greenstalk—Blueshell’s Skroderider mate—to a distant tropical atoll. Greenstalk chooses to remain there, where suspended nutrients are richest, revealing she carries eggs from Blueshell and will establish a modest Rider population on the island.

On the last night of summer, Ravna takes Jefri, Johanna, and Amdi skygazing. They discuss plans to revive the 151 children still in coldsleep, to be housed and educated at Woodcarver’s castle. Amdi identifies the location of Straumli Realm in the sky, and the children wonder if anyone survived there. Ravna reassures them that Pham’s sacrifice stopped the Blight. She privately reflects on the cosmic scale of the Great Surge—it has likely pushed the Slowness thousands of light-years outward, and the Blight fleet, lacking ramscoop capability, will drift past Tines World only in millennia. She will never know whether the surge reached high enough to destroy the Blight, but she chooses to believe it did. Though no further signals come from above, they are safe to begin again.