Gracie, Veronica, and Jughead all know that Archie is being framed by Hiram Lodge, but the evidence is stacked against him. so the gang comes up with a last-ditch plan to prove Archie's innocence: They have to go back to the scene of the crime. They have to go back to Shadow Lake. Will they also be able to avoid the sinister cult that Gracie's mom and Polly joined? Or will she be pulled in with her mom and Polly?