An exciting story for a prequel.
We discover four characters.
In a post-apocalyptic world just the choices of one perso has the biggest consequences.
This prequel present the world we will follow during the series.
The actions of one of the character sets off chain action.

What I had found very interesting in this prequel is the fact that the four characters access power practically immediately, they are the power and make the decisions ( who could be good as well as bad) instead of suffering from the power in place.