Young Bellerophon works in the stables of King Glaucus and loves horses more than anything in the world. One day, Pegasus, the great horse of the gods is seen soaring over the kingdom, and the selfish Glaucus decides he wants the flying horse for his own. Hating to see the great creature trapped, Bellerophon sets it free. Furious, the king tries to recapture it and is accidentally killed. Blamed for the king's death, Bellerophon is banished. Undaunted, he soon finds work in another kingdom. But again, when our young hero tries to protect those less fortunate, he rouses the wrath of another monarch. This time, he is sent to yet another king, along with a letter requesting he be put to death. But this third king has a conflict. On one hand, he fears reprisal from the other king if he fails to carry out the demands of the letter. On the other hand, his daughter, Philonoe has fallen in love with Bellerophon. Wanting to wash his hands of the problem, the king sends Bellerophon off to defeat the Chimera, a fire-breathing monster that has been terrorizing his kingdom, certain the young hero will die in the attempt. But just as Bellerophon is about to set out to kill the monster, Philonoe reveals the letter. Even though he now knows he's being sent to his death, Bellerophon decides to go on anyway, determined to free the citizens from the fire-breathing Chimera. For his brave and selfless efforts, the goddess, Athena gives Bellerophon a golden saddle. Putting it on Pegasus, Bellerophon becomes the first mortal ever to fly on the great horse and together they kill the Chimera.