An engineer loses his family, and finds himself as a colt in Canterlot, beside Discord's statue. When he realizes he knows the means to defeat Discord, he must do little to disrupt those events. But the rise of the New Lunar Republic demands his action. And the knowledge he can share to help everypony, demands he do something to help. He must do what he can to help his new friends, yet must carefully avoid changing things too much to let the actions to defeat Discord still work.
The Princesses and the buearcracy also realize his usefulness in forwarding their own schemes.
A look into the politics and psychology of the capital, and its people. And theory on the rise of the New Lunar Republic. Celestia faces Luna, and the NLR leadership , alone.