Summary: If the Ancient Ones are to be stopped, the power of the Olympians will not be enough. A hero will have to seek out the secrets to the Lost Power, or the world as we know it will literally fall apart. And naturally, that hero is none other than Perseus Jackson.
Olympus had been through much, and after defeating both the Titans and Gaea, some thought that nothing remained that could topple the mighty kingdom. However, even Zeus who was doing his best to remain oblivious to the rest of the world for at least a good few centuries could not ignore the ominous signs approaching. The fate of the world was being discussed at a council, but as was usual for Olympus, little seemed to be getting done.
"SILENCE!" Zeus's voice roared over the general clamor of the hall. Slowly, the voices died down and Zeus stood to make his point. "We have sensed that there have been strange disturbances of power coming from the east. We must determine what is to be done about them."
"Who can they be? The Titans and Primordials have already been defeated. What else could be a threat to us?" asked Hera. The other Olympians were also confused for the most part, but then Artemis, who had recently returned form a scouting trip to the east spoke up.
"I know every monster's name that ever walked the earth," said Artemis. "But what I felt was an unknown threat. They had such a strong aura of power that it would overwhelm even Olympus." As this news settled in, slowly all fell silent. Never had there been a being that was stronger than all the gods combined. They had no idea how to deal with such a foe, so they turned to the wisest among them. Athena remained in deep thought for a minute, then voiced her thoughts.
"This is a matter beyond our power. But in certain circumstances, a demigod can be infinitely more powerful than any god or goddess." While the majority of the Olympians had no idea what she was talking about, surprisingly it was Apollo who said in an unusually serious tone, "Athena, putting that kind of power into the wrong hands could be the end of us all. How can we trust a demigod with such an impossible task?"
"We have no choice." Zeus then concluded the meeting, and sighed. Things never seemed to settle down for the Olympians. And now to rely on a demigod again? It was beneath him. But the council had spoken so Zeus knew what had to be done.
Calling up Hermes, Zeus said, "Go to Perseus and inform him of our plans for him." The wing-footed messenger nodded and took off.