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.

At her wits end over Archie’s recent actions, Mary turns to Uncle Frank to get him back on track. Meanwhile, Betty asks Veronica for help understanding her sexuality. Elsewhere, Jughead takes action after he discovers plagiarism taking place at Pep Comics, and Cheryl and Toni’s budding attraction catches the attention of some River Vixens

Archie and Reggie lean on each other as they prepare for their big basketball game against Stonewall Prep. Meanwhile, as they deal with ongoing issues with their parents, Betty and Veronica decide to throw a slumber party with Kevin and Clay.

Panic ensues after Archie and the gang learn that Mrs. Thornton is accused of being a communist. Cheryl's father Clifford forces her to out gay students at Riverdale High or risk losing power over the Vixens. Meanwhile, Hiram's surprise arrival to town is quickly met with suspicion by Veronica, and Jughead devises a plan to get around a boycott of comic books.

As the town's past secrets start to bubble to the surface, Jughead and the gang are forced to make a difficult decision that will change each of their lives forever.

Back in the present day and longing for her former life in Riverdale, 86-year-old Betty turns to a special friend to help her relive her last day of senior year with her friends as they were, their memories restored.