A Foreigner

You will live as a person in a foreign land. You will live like a spy. Your life in a new past/new reality, in a new timeline of the old time, will require total silence on your part and the part of everyone who knows anything about you. You must live in total anonymity. Just as a spy lives in an environment and is essentially unknown, you must also live as an unknown in terms of what you know about events of the past, present, and future.