No one really has a clear answer. The next full trailer will no doubt set up the story. Dicaprio and Pitt characters live next door to Sharon Tate. You add that and the fact of Manson and his followers are cast in the movie, and folks, various articles run wild with a story they make up in their minds. This is also a lot closer to Pulp Fiction in style. I believe Tate will have her own chapter etc. Also, the Pitt and Leo characters are based on the real life friendship of Reynolds and his stunt double Hal Needham. They were also nicknamed the 'Cocaine Cowboys' of Hollywood for their wild lifestyle and partying. lol