Metamorphoses Book 8: The Minotaur
Minos returned to Crete, his home, and found that his wife had been unfaithful to him. The Minotaur, half-man, half-bull, was the result of her adultery, and Minos had Daedalus construct a labyrinth to hide the Minotaur in. Every nine years villagers of Attic were sacrificed to feed the monster, and Theseus volunteered to be part of the third sacrifice. Once inside the labyrinth, he killed the Minotaur and found his way out with the thread that Ariadne, Minos' daughter, had given him. She was in love with Theseus, so she betrayed her father as Scylla had done her own. Theseus took her away with him , but instead of marrying her as he'd promised, he left her on an island. She remained there and later found comfort in the arms of Bacchus, who made her crown a constellation in the night sky.