Most of the Riverdale teens have been away during the summer and spend some time catching each other up on their adventures. Archie stayed home but is being very secretive about his summer, and he especially doesn't want to tell anyone that he's now dating Sabrina.
Archie is uncomfortable about keeping his new romance a secret, but fortunately everyone else is absorbed in the mystery of the disappearance of Reggie's dad. Reggie discovers a recorded message from his father that reveals a secret room and a major scandal.
Betty and Veronica are determined to find out the identity of Archie's new girlfriend, but their investigation uncovers a different secret romance between Midge and Dilton. Jughead is questioned by the police about Rick Mantle's disappearance, but it's Reggie who's keeping secrets.
Betty and Veronica enlist Cheryl to help them discover who Archie is secretly dating. Elsewhere, Reggie wants Jughead's help to find his missing father.
Archie eventually agrees to Cheryl's reality show but Sabrina takes a lot more convincing. Meanwhile, Reggie and Jughead continue the search for Reggie's missing dad.