Demons attack the volunteer barracks targeting recruits specifically. Tomas is wounded defending Sarah and other volunteers but fights through. Eighty people die (thirty-seven volunteers, forty-three soldiers). Lucien returns from checking on his home—finding everything burned and Anne dead.

Tomas and the survivors encounter a Wurm in the underground - a lesser creature than the sealed Wurm Lords but still deadly. After Brennan falls, Tomas charges with the Progenitor sword and drives it into the Wurm open mouth, conducting its own fire back into its body and killing it.

Cael discovers that forty-seven of five hundred volunteers are corrupted by demonic influence, contaminating them unknowingly. With only nine percent corruption rate, the math demands recruiting seven thousand seven hundred volunteers total to get six thousand clean participants.

Thomas reflects on his transformation's price—his body and individual identity merged with the island. He guides Emily, a six-year-old, through peaceful transition. Thorne's ghost echoes offer wisdom. Thomas helps a killer find redemption through his good deeds.

One week after the first ritual, Tomas traumatized by witnessing nine hundred fifty-seven deaths. Father Aldous arrives with dangerous intelligence: rituals may strengthen Wurm Lords while buying time.

Thomas awakens transformed, merged with Network infrastructure. The system is dormant, not destroyed, awaiting purpose. Thomas reshapes it from prison to waystation for the dying, sacrificing memories and physical form. He becomes the island's foundation.

Cael and survivors encounter Commander Vessa's organized refugee group. They share resources and stories. Three demons attack the camp; the group collectively defeats them through tactics and sacrifice.

Thomas connects with the beacon core, understanding it as a door between realities. Souls are queued for departure but trapped by Harrow's dam. William Thorne arrives and volunteers to be the conductor. Thomas conducts the ceremony, releasing over two million souls while Thorne sacrifices himself.

The Martyr's Brigade prepares for the first ritual. One thousand volunteers spend their final night together sharing stories and finding peace. Tomas and Cael witness their acceptance of death. The march to the seal chamber costs forty-three lives before the ritual begins.