End of the world
The world is pretty divisive. Religious people talk about the end of days being near. Specifically now that brother are against brother, mother against daughter etc.
What if what the religious is correct? Or what if there is another theory? What if the powers that bear in battle themselves. What if evil actually had found a way to get the upper hand?
This story is exactly about that. Mankind has developed so much, yet what he has developed may have holes such that the forces well beyond our control or imagination have exploited. What if the internet has for mankind become an incredible tool for society, but for other forces, use it to destroy? Then if we are divided, how can good or the force of good counter?