When man first walked the Earth, it was saturated in divine energy. This mystical force gave birth to all kinds of magical beings, monsters, and even gods. Soon different pantheons of these divine beings laid claim to different parts of the Earth, forcing the mortals who lived there to worship them. One such pantheon were those of Greece, based out of the mythical Mount Olympus.
The Olympians would quarrel with the other gods, trying to spread their influence across the planet. To this end they would continually create new gods, using up the divine energy that existed on Earth. After several centuries the gods began to realize that the divine energy was not replenishing, in fact it was becoming less and less with each generation. Soon there no longer was enough power to create a fully formed god.
So the remaining gods turned to the demi-gods. For almost all of history the gods had bedded mortals, creating these demi-gods. While traditionally they had lived on Earth, usually as a hero of some sort, the gods realized that they could be made full gods with a little divine energy.
Even with these demi-gods becoming full gods, the power of the different pantheons began to fade as people stopped believing in them. By modern day the pool of divine energy left only allowed for a handful of demi-gods to ascend to godhood per generation. It is now such a tight race that the gods decided the only fair way to use the divine energy is by having a challenge to prove who is the most worthy demi-god.
For the Olympians, they would invest a lot into the demi-gods they made. To that end their remaining worshipers formed Pandora Agency. While appearing as a simple talent agency in California, it was in fact a place to train Greek demi-gods to participate in the challenge.
With just under a year until the next challenge, the various demi-gods interested in becoming full gods are flocking to Pandora Agency. Will the Olympians see any new members this generation? Or will other pantheons prove victorious.