Seven demigods sail to Rome. Two come home. Two fall into hell.
Who drives the story
Daughter of Athena and Percy's girlfriend, handed the one quest no child of Athena has ever survived. She out-thinks Arachne and wins the Athena Parthenos, then falls into Tartarus seconds after her victory.
Son of Poseidon, freshly recovered from amnesia and a former praetor of Camp Jupiter. He helps bring down the twin giants in the Colosseum, then lets go of the edge of Tartarus rather than let go of Annabeth.
Son of Hephaestus who built and pilots the Argo II. Possessed once, warned by Nemesis, and finally forced to break the fortune cookie whose 'cost' turns out to be Percy and Annabeth's fall—so he blames himself.
Daughter of Aphrodite and Jason's girlfriend, armed with charmspeak. She drives the eidolons out of Percy and Jason in Kansas and becomes the voice holding the group together after the fall.
Son of Jupiter, praetor of Camp Jupiter, still rebuilding a memory Hera stole. He fights the giants beside Percy and takes command of the ship after Percy falls.
Daughter of Pluto, recently returned from the dead, and Frank's girlfriend. Leo's face—identical to her lost first love Sammy Valdez—reopens her past at the worst possible time.
Son of Mars and a legacy of Poseidon, Hazel's boyfriend. He clashes with Leo over Hazel before fighting beside him underground in Rome and vowing to get Percy and Annabeth back.
Satyr chaperone from Camp Half-Blood who guards the Argo II while the others search Rome, then paces the deck demanding they move before Gaea does.
Son of Hades, captured by the giants Ephialtes and Otis while seeking the Doors of Death. Rescued weak and barely conscious from their jar, he insists Percy and Annabeth can come back from Tartarus.
How they are connected
Daughter of Athena and Percy's girlfriend, handed the one quest no child of Athena has ever survived.
Possessed once, warned by Nemesis, and finally forced to break the fortune cookie whose 'cost' turns out to be Percy and Annabeth's fall—so he blames himself.
Possessed once, warned by Nemesis, and finally forced to break the fortune cookie whose 'cost' turns out to be Percy and Annabeth's fall—so he blames himself.
Daughter of Aphrodite and Jason's girlfriend, armed with charmspeak.
She drives the eidolons out of Percy and Jason in Kansas and becomes the voice holding the group together after the fall.
He fights the giants beside Percy and takes command of the ship after Percy falls.
Daughter of Pluto, recently returned from the dead, and Frank's girlfriend.
Leo's face—identical to her lost first love Sammy Valdez—reopens her past at the worst possible time.
He clashes with Leo over Hazel before fighting beside him underground in Rome and vowing to get Percy and Annabeth back.
He clashes with Leo over Hazel before fighting beside him underground in Rome and vowing to get Percy and Annabeth back.
He clashes with Leo over Hazel before fighting beside him underground in Rome and vowing to get Percy and Annabeth back.
Rescued weak and barely conscious from their jar, he insists Percy and Annabeth can come back from Tartarus.
Go deeper
The price of victory · Unity built on broken trust · Wits over strength · Descent as the true test
Themes explainedThe full story act by act, the ending explained and a quick quiz.
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