Fifteen years have gone by since the night of the fateful ball.
Looking back, Leo still gets sad when he thinks of Stargirl leaving.
Flashback time: A few weeks after Stargirl leaves, Leo goes by her house and sees that it is for sale and that nothing is in it.
Stargirl doesn't even finish the school year. She just vanishes into thin air.
He tries to get information from Archie about where she went, but poor old Archie doesn't have much information to give to him.
Lonely Leo wants affirmation that she really existed, which Archie gives him. He also explains the rarity of "star people."
By "star people" he means people that are so different that you can't really figure them out.
Archie explains that we are all made of the same basic elements, the same ancient stuff. Even Barney the skull is made of it.
He believes that every once in a while a person comes along who is more connected to these old elements, someone who is more connected to the past.
Poor Leo has difficulty understanding all of this, but he feels like the explanation fits Stargirl's story.
Archie also assures Leo that Stargirl really liked him. After all, she did give up her identity for a while to please him.
Leo continues to attend the Loyal Order of the Stone Bone meetings at Archie's house, but they do not speak of Stargirl again for an entire year.
Then, right before Leo leaves for college, Archie shows Leo Stargirl's office. It turns out that it was in a toolshed at his house.
All the stuff he expected to see in her room was in the shed: tons of arts and crafts supplies, a phone book, a giant calendar with birthdays marked on it, and the scrapbook for Peter Sinkowitz, among other trinkets.
There's even a filing cabinet that contains files on a ton of different people.
So what does Leo do? He pulls out the file on him, of course. In it he finds clippings from the newspaper about him, candid photographs and a sheet of paper with a "likes" and "dislikes" heading.
He remarks to Archie that she was like a spy, but Archie tells him it was a "lovely treason" (31.45).