Odysseus goes to Circe's island for directions and finds out through Circe how to avoid the monsters he will see.
Odysseus' crew goes near the Sirens, monsters disguised as women who lure men to their doom through singing, and trickery.
Odysseus' crew puts wax in their ears to avoid the sound of the women, but Odysseus is curious of what they sound like so is ordered to be tied to the mast. He tells his men to let him go when he hears their voices, but they tie him even more.
After the sirens, Odysseus and his crew go through a straight with 2 monsters on either side. One is a powerful whirlpool, the other eats men.
Odysseus gives his men an inspiring talk and they head toward Scylla, the man eating monster.
Odysseus decided to head toward Scylla because he thought it would be better to lose a couple men then it is to risk losing an entire ship.