Odyseuss is on the land of Laestrygonians. There Circe tells him about what will happen in his future journey to Itheca. He later tells his men about the plan on how to face the first challenge. The Sirens.
Odysseus tells his men the plan to tie him up and don't release him no matter what, he also plans to plug there ears with wax, so they don't hear the Siren's song.
Odysseus and his men encounter the Sirens and Odysseus struggles to untie himself while trying to hear the Siren's song.
After escaping the Sirens; Odysseus and his men encounter Charybdis, a raging, deadly, whirlpool.
While fighting to avoid the whirlpool, Odysseus keeps the secret they waits his men; Scylla the 6 headed monster is waiting to take six of his men.
Scylla takes six of Odysseus's best men and ate them. He sacrificed six men over the life of all of them, and kept his journey home going.