Betty and Rose are twin sisters so when their older sister Polly got pregnant and sent away 5 months ago they made a big promise to their mom. Betty is with Archie, Veronica is with Reggie and Rose is with Jughead. What happens when one of the Cooper twins breaks their promise to their mom. It all begins with the night of the drive in movie theater. Set in season 1. Parts may not follow the show. *I do not own any of the riverdale characters except for Rose Cooper and her story line *