Jason and the Argonauts and the labour of the Golden Fleece

However, Aetes then went back on his word and set his army to attack the Argo at night. Medea, who knew about her father's plan, quickly brought Jason to the grove where the Golden Fleece was hanging. She sang the dragon to sleep with a lullaby and Jason quickly seized the Golden Fleece and ran back to the ship. Jason and the Argonauts rowed away and Medea followed them. Later on she became Jason’s wife.

When the ship of Argo returned to Thessaly, Jason found Pelias still unwilling to give up his land. So Medea put a spell to Pelias to sleep and convinced Pelias’ daughters that her father had died. In order to return to life, they were advised to cut him to pieces and boil; so they did and, without knowing, they killed their father all by themselves.

Jason and Medea lived happily together for 10 years, when Jason fell in love with Glauce, a princess of Corinth. When Medea found out about her husband's affair, she killed all her children and then fled from Thessaly. Jason grew old lonely and in the end he killed himself by falling from the stern of the Argo.