Hera decided to give a hero's test to Jason. On his way to his kingdom to reclaim the throne, Jason came across Hera (dressed as an old woman)who asked for help crossing the stream. He carried her across and continued on his way
Jason finally arrived to lolcus and found his uncle Pelias still in control while his father was still imprisoned. Pelias told his nephew that the Golden Fleece was to be hus quest. JAson thought it through and agreed to the mission
I've come before you to claim the throne as the rightful king of locus."
"Only if you retrieve the Golden Fleece to me will I give up the throne."
Jason needed a ship for the expedition and also had to gather around 53 heroes to accompany him. The entire group were called the Argonauts.
Jasons last task was to overcome the dragon that guarded the Golden Fleece. Medea offered a sleeping potion and Jason made the dragon sleep. Taking the Golden Fleece was much easier
Jason returned to the lolcus where he found his father dying. Medea made a potion for him to regain his health for a few more years. Jason was able to reclaim his throne as a hero.