As rehearsals for this year's musical "Heathers: The Musical" get underway, Cheryl (Madelaine Petsch), as queen bee Heather Chandler, channels her own HBIC to deal with a recent fallout. Meanwhile, Betty (Lili Reinhart) grows increasingly annoyed by Evelyn's (guest star Zoe De Grand'Maison) involvement with the musical - as well as the lives of her friends. Elsewhere, Veronica (Camila Mendes) learns some devastating news about her family, and Archie (KJ Apa) and Josie (Ashleigh Murray) make a decision about their future. Lastly, Jughead (Cole Sprouse) makes a surprising move against Gladys (guest star Gina Gershon).