In their quest to confront the ultimate evil, Percy and his friends battle swarms of mythical creatures to find the mythical Golden Fleece and to stop an ancient evil from rising.

Jason, a fearless sailor and explorer, returns to his home land of Thessaly after a long voyage to claim his rightful throne. He learns, however, that he must first find the magical Golden Fleece. To do so, he must embark on an epic quest fraught with fantastic monsters and terrible perils.

At an academy for mythological warriors, 17-year-old Hercules meets Jason, the next in line to rule Corinth. When Jason discovers that his father is ill, Hercules decides to seek out the Golden Fleece that could cure him. But limitations to his powers, as well as his half-brother Ares, stand in his way.

Based on the plot of Euripides' Medea. Medea centers on the barbarian protagonist as she finds her position in the Greek world threatened, and the revenge she takes against her husband Jason who has betrayed her for another woman.

In this melange of characters and events from separate mythological stories, Hercules, demigod and superman, arrives in the ancient Greek kingdom of Iolcus to tutor Iphitus, son of king Pelias; immediately on arrival, he falls in love with the king's delectable, briefly clad daughter Iole. Before he can win her, he must succeed in a series of quests, in the course of which he teams up with Jason, true heir of Iolcus, whom he accompanies on the famous voyage of the Argonauts.