Innocent Soul: Tenacious Defender Of Humanity

I was working in my study room late night when a stranger dropped in and took me on a journey from where it was impossible to return to my normal self. He recapitulated several incidences from my life evocatively - just to ask for a frivolous favour. I wondered if he was a conman.
What if you meet the same person in your lifetime? The encounter may not be as horrifying as you would imagine.
How would you react when you come to know that the visitor is none other than the estranged soul?