Iasoon, the leader of the mission with his galley, the featherlightship Argoo, to get the Golden Skin and assisted by fifty heroes and halfgods, as there were the Dioscures, Castor and Pollux ...
The Golden Skin is protected by a dragon and Iasoon has to eleminate the dragon and the furious bull. The furious bull was drilled and tamed to plough the land. The teeth of the dragon were sowed and outgrew as soldiers.
In the struggle with the dragon Iasoon gets help from the magical Medeia.