Lyric discussion by PJ10 

its written from the point of view of the elderly woman, who has some menial job behind a counter in a store, who has never left her small town. someone has just walked in who she recognizes from her past. the song is about the flood of feelings and memories (hearts and thoughts) that she experiences seeing this person walk through the door.

@PJ10 It's not just anybody. It's a former lover, from her 30s I dare to guess.

@PJ10 I think Alieno is correct AFA being lovers.

An error occured.