1) The Golden Fleece originated from a princess who was transformed into a sheep by Poseidon and gave birth to a lamb with golden wool.
2) Jason, heir to the throne of Iolcus, was sent by King Pelias on a quest to retrieve the Golden Fleece from Colchis in order to claim his throne.
3) With the help of the sorceress Medea, Jason completed the tasks set by King Aeetes of Colchis, including yoking fire-breathing bulls and fighting an army of skeletons, and retrieved the Golden Fleece.