You were the head advisor of the true royal family. After the crown prince/princess was born you were allowed leave for family matters.
You came back to a much different world. Someone had murdered the Royal couple, stole the throne and dropped the child in the exile lands. You were horrified, and saddened, but it was too late now.
Many years later the prince/princess, now the banished heir and leader of the unified exiles, came back and took their throne back. They butchered the usurper and was now going through those loyal to said usurper and lopping their heads off.
When they came to you, you cried out, begging for mercy and telling the heir you knew them as a babe.
