When your best friend wants you to test out a time door you can't say no right?

I promised to stick to the shadows. See everything but not be seen.

Until the biggest name in Rock and Roll sees me.

His history is written, and it doesn't include me.

Or does it?

When parts of the past start happening all around me, I have to wonder if this is where I was always meant to be.

The problem? I know the day he dies. And it's fast approaching.

Can I stop it? And what happens if I do?