You are the wealthy son of some aristocrats, but when you were a boy, your parents were murdered violently.
You languished in a meaningless existence for a number of years before you set off on your own to see if you could make a man of yourself.
After spending some time in Glymarch prison, you meet a man who tells you a story of a place that you should go if you truly want to be something.
You climb to the peak of the mountain to find the monastery, bringing them the token that they asked for, and your training begins.
You learn to fight, the art of subterfuge, how to kick and vanish. You become truly an assassin.
And then your final test. You are told to kill a man whom you don't believe deserves to die. You refuse.
A tremendous fight ensues, and the monastery is burned to the ground.
You return home, vowing to fight the darkness with every tool at your disposal.