What would you do if you are thrown into another world against you're will? What if you had an obligation? Would you risk everything to succeed? Or would you even care? This is what Connor chose to do.
A human from earth is taken to Equstria to be pleaded to, and asked stop a dire evil. Accepting the task not knowing what hes getting into, he learns that it is something he faced before and must prevent himself from turning into the evil as well.