As Bailey's Comet passes over Rivervale, Cheryl and Nana Rose revisit the tragic stories of the Blossom women through the years. Meanwhile, the once-in-a-lifetime celestial event prompts Cheryl to summon a familiar face to Rivervale.

As news begins to spread about the bombing at the Andrew's home, Archie, Betty and Jughead begin to deal with mysterious side effects from the explosion. Elsewhere, Veronica spirals after learning that Hiram may have been involved, and Cheryl is consumed with guilt when she believes she may have had a hand in the explosion.