A truce party approaches under a huge white flag: a peaceful-looking Hyperborean giant, an empousa, Ethan Nakamura, and a tuxedoed Titan who introduces himself as Prometheus. Thalia identifies the giant as one of the northern Hyperboreans, and Percy recognizes Ethan from the Williamsburg Bridge fight. Prometheus asks to parley, while the giant accidentally damages the playground and fountain.

Prometheus argues that Percy’s defense of Manhattan is doomed. He says Kronos’s forces outnumber the demigods, that another attack will come that night, and that the defenders will be driven back to the Empire State Building before being destroyed. Prometheus frames the conflict as a repetition of the Trojan War, urges Percy to surrender, and claims Kronos only wants Olympus because destroying the gods’ seats of power will weaken them before Typhon arrives.

Thalia rejects Prometheus’s offer and defends Artemis and the Hunters, but Prometheus unsettles her by using her surname, Grace. Prometheus then appeals to Percy by presenting himself as a benefactor of humanity and by invoking Calypso as proof that Titans and their children are not all evil. Percy challenges Ethan, who reveals that he joined Kronos because Nemesis and the minor gods were denied respect; Ethan believes losing an eye was fair payment for a future chance to shift the balance of power.

Prometheus touches Percy’s forehead and shows a vision from Luke Castellan’s past. In May Castellan’s home, Luke angrily confronts Hermes for abandoning him to a frightened childhood with his unstable mother. Hermes admits only indirectly that he knows Luke’s fate and refuses to reveal it, insisting Luke must walk his own path. Luke leaves with Thalia and young Annabeth, while May collapses in a prophetic fit and Hermes sadly confirms that he knows danger awaits his son.

Back in Central Park, Prometheus uses the vision to argue that the gods knowingly let their children suffer and that Percy’s own father may be hiding Percy’s fate. Grover warns that Prometheus is manipulating Percy’s emotions, and Percy refuses the surrender terms. Prometheus then gives Percy Pandora’s jar, explaining that it still contains Elpis, the spirit of Hope; if Percy opens it and releases Hope, Prometheus will understand that Percy has surrendered. Percy rejects the gift, but Prometheus says it cannot be returned, then leaves with Ethan, the empousa, and the giant Morrain.