They know

What if the mist was gone?
What if the half-bloods where in danger to be revealed?
What if the mortals would do experiments with them?
Would the demigods want to be controlled and killed by lower beings?
Find out how the demigods fight and conquer the mortal world.
When they come out of their hiding after millennia.
Is there going to be war or peace?
Who's blood will be shed?

Disclaimer: I only owe the plot. The characters are owned by Rick Riordan.