Jason, a hero from Iolcus, embarks on a quest to retrieve the Golden Fleece after his uncle Pelias usurps his father’s throne. With a group of heroes known as the Argonauts, Jason faces various challenges, including the treachery of king Aeetes and encounters with divine beings. Ultimately, with the aid of Medea, he successfully acquires the fleece but faces tragic consequences in his later life due to infidelity and revenge.