1) The document is a screenplay that tells the story of Aster and her relationship with Billy over the course of a year. It begins with Aster socializing with friends before meeting Billy at a party.
2) Over the next year, the screenplay shows Aster and Billy's relationship develop as they use drugs recreationally with their friends.
3) In the final scenes, Billy introduces Aster to heroin and they use together. The following day, Billy wakes up to find that Aster has overdosed and died on the couch next to him.