In the aftermath of Hiram's newly announced plans for Riverdale, Jughead resorts to drastic measures to voice his opposition. After making her own big announcement, Hermione's friend Andy Cohen comes to town to lend a hand. Meanwhile, Veronica goes against her parent's wishes to keep a low profile when she decides to run for student council president. Elsewhere, Mary arrives in Riverdale just as tensions between Fred and Archie reach a breaking point. Finally, following a series of mysterious events, Cheryl begins to fear that someone is out to get her.

As Riverdale High begins rehearsals for its upcoming production of "Carrie the Musical," the arrival of an ominous letter forces director Kevin to make a difficult decision about the show. Jughead uses his cover as the musical's documentarian to solve the mystery behind the letter. Meanwhile, tensions between Betty and Veronica continue to escalate just as Alice announces she is joining the musical to spend more time with Betty. Elsewhere, Hiram enacts a devious plan to further drive a wedge between Fred and Archie, while Cheryl channels Carrie White during a showdown with her mother.