After suspecting that Percival is about to make a big play, Archie, Betty and Jughead warn their friends about his potential threat to the town. Meanwhile, Toni also finds herself a target after Percival announces his plans to rid the town of gangs, including the Serpents. Finally, Cheryl makes her move against Archie, Betty and Jughead.

When Archie and Veronica's attempt to negotiate with Percival doesn't go as planned, the forces of good and evil finally face off, leading to some unexpected revelations.

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.