<Table> <Tr> <Td> </Td> <Td> This article's plot summary may be too long or excessively detailed . Please help improve it by removing unnecessary details and making it more concise . (October 2014) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article's plot summary may be too long or excessively detailed . Please help improve it by removing unnecessary details and making it more concise . (October 2014) (Learn how and when to remove this template message) </Td> </Tr> <P> The seven demigods continue their journey through Greece . Upon hearing that resurrected souls are gathering at Odysseus' home in Ithaca, Jason, Piper, and Annabeth disguise themselves with Hazel's Mist to infiltrate the proceedings . They learn that Gaea's army does not plan to invade Mount Olympus as expected, but the Acropolis in Athens, where most of them have gathered . Since the Gulf of Corinth is heavily fortified and guarded by the army, the demigods decide they have no choice but to circle the whole Peloponnese to reach Athens . When Michael Varus, one of the souls, recognizes the demigods' deception, he forces Jason to confront his mother's insane spirit, whom Jason rejects, and mortally wounds Jason . As Jason recuperates, the three demigods use Odysseus' marriage bed to summon Juno who is stabilized because the bed represents Penelope's faithfulness to her husband, Odysseus . She tells them to seek Nike at Olympia and reach out to Artemis and Apollo, both of whom have been banished by Zeus . At Olympia, Percy, Leo, Hazel, and Frank are forced to participate in Nike's deadly Olympic Games, capture and detain her . Coerced, she reveals that one of them is destined to die, and that they need the "Physician's Cure". It is a cure that consists of Pylosian mint, the heartbeat of the chained god, and the curse of Delos . </P> <P> Frank is able to obtain the first ingredient, the Pylosian Mint, from his shapeshifter relatives in Pylos . The others decide the chained god is Ares because the Spartans had a statue of him that was chained down to ensure they would win every war . Piper and Annabeth head out to the temple of Ares located in the ruins of Sparta, where the second ingredient, the Makhai, is located . They battle Mimas, and Piper manages to defeat him with a statue of Phobos . While sailing through the Aegean Sea, the Argo II is hit by a violent storm that Percy and Jason discover is caused by Kymopoleia, a daughter of Poseidon, who is working with Polybotes . Jason convinces Kymopoleia to switch sides and together they kill Polybotes; in return, he swears to become a Pontifex Maximus after the war and to give the first offering to her . After reaching Mykonos, Leo, Frank, and Hazel meet with Artemis and Apollo at the nearby Delos where, with Leo's offering, Apollo gives them the third ingredient, the cursed aster, and reveals that the Python at Delphi is blocking his ability of prophecy . He also reveals that his son, Asclepius, who is able to make the cure, is at Epidaurus . Upon leaving the island, Leo tells Hazel and Frank about his plan to sacrifice himself to defeat Gaea and inject himself with the cure afterwards . After obtaining the cure from Asclepius and finally reaching Athens, the demigods head to the Acropolis and battle the army of giants, whom they kill with the help of the gods, led by Zeus, after their split personalities are healed by the return of Athena Parthenos . However, the giants are able to injure Percy and Annabeth, whose blood wakes Gaea . </P>

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