The Odyssey began ten years after the end of the ten-year Trojan War (the subject of the Iliad), and Odysseus has still not returned home from the war. Odysseus' son Telemachus is about 20 years old and is sharing his absent father's house on the island of Ithaca with his mother Penelope and a crowd of 108 boisterous young men, "the Suitors", whose aim is to persuade Penelope to marry one of them, all the while enjoying the hospitality of Odysseus' household and eating up his wealth.
Odysseus' protectress, the goddess Athena, discusses his fate with Zeus, king of the gods, at a moment when Odysseus' enemy, the god of the sea Poseidon, is absent from Mount Olympus. Then, disguised as a Taphian chieftain named Mentes, she visits Telemachus to urge him to search for news of his father. He offers her hospitality; they observe the suitors dining rowdily while the bard Phemius performs a narrative poem for them. Penelope objects to Phemius' theme, the "Return from Troy", because it reminds her of her missing husband, but Telemachus rebuts her objections.
That night Athena, disguised as Telemachus, finds a ship and crew for the true Telemachus. The next morning, Telemachus calls an assembly of citizens of Ithaca to discuss what should be done with the suitors. Accompanied by Athena (now disguised as Mentor), he departs for the Greek mainland and the household of Nestor, most venerable of the Greek warriors at Troy, now at home in Pylos. From there, Telemachus rides overland, accompanied by Nestor's son, Peisistratus, to Sparta, where he finds Menelaus and Helen who are now reconciled. He is told that they returned to Sparta after a long voyage by way of Egypt. There, on the island of Pharos, Menelaus encountered the old sea-god Proteus, who told him that Odysseus was a captive of the nymph Calypso. Incidentally, Telemachus learns the fate of Menelaus' brother Agamemnon, king of Mycenae and leader of the Greeks at Troy: he was murdered on his return home by his wife Clytemnestra and her lover Aegisthus.
Escape to the Phaeacians
The second part tells the story of Odysseus. After having spent seven years in captivity on Calypso's island, Ogygia, Calypso falls deeply in love with him but he has consistently spurned her advances. She is persuaded to release him by Odysseus' great-grandfather, the messenger god Hermes, who has been sent by Zeus in response to Athena's plea. Odysseus builds a raft and is given clothing, food and drink by Calypso. When Poseidon finds out that Odysseus has escaped, he wrecks the raft but, helped by a veil given by the sea nymph Ino, Odysseus swims ashore on Scherie, the island of the Phaeacians. Naked and exhausted, he hides in a pile of leaves and falls asleep. The next morning, awakened by the laughter of girls, he sees the young Nausicaa, who has gone to the seashore with her maids to wash clothes after Athena told her in a dream to do so. He appeals to her for help. She encourages him to seek the hospitality of her parents, Arete and Alcinous, or Alkinous. Odysseus is welcomed and is not at first asked for his name. He remains for several days, takes part in a pentathlon, and hears the blind singer Demodocus perform two narrative poems. The first is an otherwise obscure incident of the Trojan War, the "Quarrel of Odysseus and Achilles"; the second is the amusing tale of a love affair between two Olympian gods, Ares and Aphrodite. Finally, Odysseus asks Demodocus to return to the Trojan War theme and tell of the Trojan Horse, a stratagem in which Odysseus had played a leading role. Unable to hide his emotion as he relives this episode, Odysseus at last reveals his identity. He then begins to tell the story of his return from Troy.
Odysseus' account of his adventures
After a piratical raid on Ismaros in the land of the Cicones, he and his twelve ships were driven off course by storms. They visited the lethargic Lotus-Eaters who gave two of his men their fruit which caused them to forget their homecoming, and then were captured by the Cyclops Polyphemus, escaping by blinding him with a wooden stake. While they were escaping, however, Odysseus foolishly told Polyphemus his identity, and Polyphemus told his father, Poseidon, that Odysseus had blinded him. Poseidon then curses Odysseus to wander the sea for ten years, during which he would lose all his crew and return home through the aid of others. After their escape, they stayed with Aeolus, the master of the winds and he gave Odysseus a leather bag containing all the winds, except the west wind, a gift that should have ensured a safe return home. However, the greedy sailors foolishly opened the bag while Odysseus slept, thinking it contained gold. All of the winds flew out and the resulting storm drove the ships back the way they had come, just as Ithaca came into sight.
After unsuccessfully pleading with Aeolus to help them again, they re-embarked and encountered the cannibalistic Laestrygonians. All of Odysseus's ships except his own entered the harbor of the Laestrygonians' Island and were immediately destroyed. He sailed on and visited the witch-goddess Circe. She turned half of his men into swine after feeding them cheese and wine. Hermes warned Odysseus about Circe and gave Odysseus a drug called moly which gave him resistance to Circe's magic. Circe, surprised by Odysseus' resistance, agreed to change his men back to their human form in exchange for Odysseus' love. They remained with her on the island for one year, while they feasted and drank. Finally, guided by Circe's instructions, Odysseus and his crew crossed the ocean and reached a harbor at the western edge of the world, where Odysseus sacrificed to the dead. He first encountered the spirit of crewmember Elpenor, who had gotten drunk and fallen from a roof to his death, which had gone unnoticed by others, before Odysseus and the rest of his crew had left Circe. Elpenor's ghost told Odysseus to bury his body, which Odysseus promised to do. Odysseus then summoned the spirit of the old prophet Tiresias for advice on how to appease the gods upon his return home. Next Odysseus met the spirit of his own mother, who had died of grief during his long absence. From her, he got his first news of his own household, threatened by the greed of the Suitors. Finally, he met the spirits of famous men and women. Notably he encountered the spirit of Agamemnon, of whose murder he now learned, and Achilles, who told him about the woes of the land of the dead (for Odysseus' encounter with the dead, see also Nekuia).
Returning to Circe's island, they were advised by her on the remaining stages of the journey. They skirted the land of the Sirens, who sang an enchanting song that normally caused passing sailors to steer toward the rocks, only to hit them and sink. All of the sailors except for Odysseus, who was tied to the mast as he wanted to hear the song, had their ears plugged up with beeswax. They then passed between the six-headed monster Scylla and the whirlpool Charybdis, Odysseus losing six men to Scylla, and landed on the island of Thrinacia. Zeus caused a storm which prevented them leaving. While Odysseus was away praying, his men ignored the warnings of Tiresias and Circe and hunted down the sacred cattle of the sun god Helios as their food had run short. The Sun God insisted that Zeus punish the men for this sacrilege. They suffered a shipwreck as they were driven towards Charybdis. All but Odysseus were drowned; he clung to a fig tree above Charybdis. Washed ashore on the island of Ogygia, he was compelled to remain there as Calypso's lover until she was ordered by Zeus, via Hermes, to release Odysseus.
Return to Ithaca
Having listened with rapt attention to his story, the Phaeacians, who are skilled mariners, agree to help Odysseus get home. They deliver him at night, while he is fast asleep, to a hidden harbour on Ithaca. He finds his way to the hut of one of his own slaves, the swineherd Eumaeus. Athena disguises Odysseus as a wandering beggar so he can see how things stand in his household. After dinner, he tells the farm laborers a fictitious tale of himself: He was born in Crete, had led a party of Cretans to fight alongside other Greeks in the Trojan War, and had then spent seven years at the court of the king of Egypt; finally he had been shipwrecked in Thesprotia and crossed from there to Ithaca.
Meanwhile, Telemachus sails home from Sparta, evading an ambush set by the Suitors. He disembarks on the coast of Ithaca and makes for Eumaeus's hut. Father and son meet; Odysseus identifies himself to Telemachus (but still not to Eumaeus), and they decide that the Suitors must be killed. Telemachus goes home first. Accompanied by Eumaeus, Odysseus returns to his own house, still pretending to be a beggar. When Odysseus's dog (who was a puppy before he left) saw him, he was so excited that he died.He is ridiculed by the Suitors in his own home, especially by one extremely impertinent man named Antinous. Odysseus meets Penelope and tests her intentions by saying he once met Odysseus in Crete. Closely questioned, he adds that he had recently been in Thesprotia and had learned something there of Odysseus's recent wanderings.
Odysseus's identity is discovered by the housekeeper, Eurycleia, when she recognizes an old scar as she is washing his feet. Eurycleia tries to tell Penelope about the beggar's true identity, but Athena makes sure that Penelope cannot hear her. Odysseus then swears Eurycleia to secrecy.
Slaying of the Suitors
The next day, at Athena's prompting, Penelope maneuvers the Suitors into competing for her hand with an archery competition using Odysseus' bow. The man who can string the bow and shoot it through a dozen axe heads would win. Odysseus takes part in the competition himself: he alone is strong enough to string the bow and shoot it through the dozen axe heads, making him the winner. He then turns his arrows on the Suitors and with the help of Athena, Telemachus, Eumaeus and Philoteus the cowherd, he kills all the Suitors. Odysseus and Telemachus hang twelve of their household maids, who had betrayed Penelope or had sex with the Suitors, or both; they mutilate and kill the goatherd Melanthius, who had mocked and abused Odysseus. Now at last, Odysseus identifies himself to Penelope. She is hesitant, but accepts him when he mentions that their bed was made from an olive tree still rooted to the ground. Many modern and ancient scholars take this to be the original ending of the Odyssey, and the rest to be an interpolation.
The next day he and Telemachus visit the country farm of his old father Laertes, who likewise accepts his identity only when Odysseus correctly describes the orchard that Laertes had previously given him.
The citizens of Ithaca have followed Odysseus on the road, planning to avenge the killing of the Suitors, their sons. Their leader points out that Odysseus has now caused the deaths of two generations of the men of Ithaca: his sailors, not one of whom survived; and the Suitors, whom he has now executed. The goddess Athena intervenes and persuades both sides to give up the vendetta, a deus ex machina. After this, Ithaca is at peace once more, concluding the Odyssey.