After new information surrounding Jason's death comes to light, Cheryl finds herself under a cloud of suspicion and forced to come clean about the last time she saw her brother. Meanwhile, Archie makes a tough decision that puts a major strain on his relationship with Miss Grundy. Elsewhere, Betty decides to revive the school newspaper and asks for Jughead's help in investigating Jason's death, while Veronica and Ethel work on exposing some of Riverdale High's football players after rumors of a "shame book" begin to circulate. Finally, after getting grounded by his dad Fred, Archie must figure out a way to make it to the Taste of Riverdale event where Josie and the Pussycats will be performing a song he helped write.

When Fred decides to finalize the divorce with Archie’s mother Mary, Archie hides his true feelings. Archie tries to win Valerie back with a romantic evening, however, Betty hijacks his plans when she decides to throw Jughead a surprise birthday party. Once Cheryl learns of the party, she decides to make it interesting and things quickly get out of control. Meanwhile, Veronica contemplates whether she should participate in the deposition to help get her Dad released.

With the gunman still at large and the residents of Riverdale on edge, Betty leads the charge to save Pop's after learning that the diner may be forced to close its doors forever. Meanwhile, the gang becomes increasingly concerned for Archie's well being after noticing a string of unusual behavior from him. Elsewhere, Betty and Veronica approach Cheryl and Josie for their help saving Pop's, while Jughead's attempt to find FP a new lawyer may have some serious repercussions. Finally, when a past betrayal unexpectedly comes to light, Veronica finds herself at a crossroads with Hiram and Hermione.

Archie gets frustrated by the lack of progress made in catching his father’s shooter, so he takes matters into his own hands to send the gunman a message. Meanwhile, Veronica is thrilled when Hiram’s attempt to start fresh means she gets to introduce him to her friends, including Archie. Elsewhere, Jughead starts his first day at Southside High and is befriended by a Southside Serpent named Toni, while Kevin’s attempt at having a little fun causes Betty to grow concerned for his safety.

When Archie’s attempt to take matters into his own hands spirals out of control, Mayor McCoy calls an emergency town hall meeting to deal with the growing chaos in Riverdale. Meanwhile, when Betty finds herself at the center of a deepening mystery, her decision to keep some parts of it from Jughead causes further friction between the two. Elsewhere, Veronica grows concerned for Archie when she realizes the lengths he would go to seek revenge against the person terrorizing Riverdale. Finally, tensions between the North and Southside finally come to a head and leads to an unexpected showdown.

As the jury begins deliberations in his murder trial, Archie makes a surprising request about how he wants to spend his final days of summer. Betty is forced to deal with her problems head-on after a heated confrontation with Alice and Polly brings up some dark secrets she’s kept hidden. Veronica pleads with Hiram to step in and help Archie before a verdict is announced. Finally, Jughead leads the Serpents against the Ghoulies latest attack.

Unnerved by a series of strange happenings around him, Jughead's quest for answers leads him to uncover the truth about Rivervale.