Refusing to accept what's going on around her, Alice creates an imaginary musical fantasy world in which the Coopers are one big happy family again. But as her mother continues to spiral, Betty does her best to pull her back to reality.

As the gang plan an event celebrating two of their own, strange biblical plaques around town threaten to put a damper on the special day.

After coming together to stop Bailey’s comet, the gang finds themselves transported back to a simpler time — Riverdale 1955. Archie attempts to impress the new girl Veronica. Toni, Tabitha and Betty take a stand against Principal Featherhead. Meanwhile, Jughead attempts to convince the gang that they're from the future.

Riverdale High's sock hop is around the corner and Archie has his sights set on taking Veronica (Camila Mendes) to the dance. Betty is confused when Kevin appears uninterested in taking things to the next level with her. Elsewhere, Jughead takes aim at Pep Comics, and Toni attempts to convince Cheryl to let Fangs perform at the sock hop.

Veronica decides to host a ghost show after learning that Riverdale doesn't celebrate Halloween the way she's use to in LA. Betty makes the most out of her night out with Archie and Reggie, and Jughead makes a major discovery in a mystery brewing in Riverdale.

After Principal Featherhead agrees to let Kevin present him with an original musical written by him and Clay, Kevin learns the group might not be as into it as he had hoped. Elsewhere, musical rehearsals prompt Archie to question what he wants in life, while Betty and Veronica confront what's going on between them.