The song is about a girl named Betty, who is asked by friends to confirm that she is dating Jimmy, the leader of a motorcycle gang, whose ring they see on Betty's finger. After singing of love at first sight ("( By the way, where'd you meet him?) I met him at the candy store / He turned around and smiled at me / You get the picture? / (Yes, we see) That's when I fell for the Leader of the Pack" ), Betty's heart turns to despair as she bemoans her parents' disapproval. The parents claim Jimmy hails from "the wrong side of town" and ask Betty to tell Jimmy goodbye and find someone new. Betty reluctantly does as she is asked, and a crushed and tearful Jimmy speeds off on his motorcycle. Moments later, Betty's pleas for Jimmy to slow down are in vain as Jimmy crashes on a rain-slicked surface and dies.

Where did betty meet the leader of the pack? Let's have some stream of consciousness first.
The relevant information to answer the above question is: I met him at the candy store / He turned around and smiled at me / You get the picture? / (Yes, we see) That's when I fell for the Leader of the Pack" ), Betty's heart turns to despair as she bemoans her parents' disapproval. So, the answer is the candy store.