Upon seeing Annie (Shenae Grimes) and Ethan (Dustin Milligan) kissing, Naomi (AnnaLynne) decides to take matters into her own hands to get back at Annie for her deceit. The students are in shock about the news that Ryan (Ryan Eggold) hooked up with one of the students, Kimberly (guest star Jessica Lucas), and that he has taken a leave of absence. Kelly (Jennie Garth) returns from her trip to visit Dylan and confronts Ryan about the allegations. Harry (Rob Estes) and Debbie (Lori Loughlin) throw a party for Annie's sixteenth birthday, and everyone except Naomi is surprised when someone from Annie's past shows up. Annie and Naomi get into a screaming argument about their alleged backstabbing. After having dinner with Navid and his family, Adrianna (Jessica Lowndes) learns that Navid (Michael Steger) is a virgin.