Jason was a legendary Greek hero who was the leader of the Argonauts and the seeker of the Golden Fleece. He was tasked with retrieving the Golden Fleece from the mythical land of Colchis, which was guarded by a dragon. Jason's quest was aided by the goddess Hera, who provided him with a magical vessel called the Argo. With the help of his crew, Jason was able to successfully retrieve the Golden Fleece and return it to Greece.