After they went to the Laestrygonians, then they got on the boat and end up at an Island and it is Circe
Odysseus sent some of the men to explore and they found a great house with a beautiful women coming out singing, and she tells them to come in
All the men, but one went in the house and she mixed them some bowls of a sweet concoction and they started to transform into pigs, becasue it was a spell
The one man that didn't go in the house went back to the boat and told Odysseus what was happening
While Odysseus is looking for something to do, Hermes finds Odysseus and Hermes gives him a herb that will fail her magic and when that happens she will try to seduce you, then he tells him you will then threaten her with your sword- make her swear to never hurt you and to release your men
So when he goes in and gets the food and her magic failed she tried to seduce him and he did as Hermes said and threatened her, and got all the men and they stayed there for a whole year.