"Katie (Megan Prescott) won’t leave the house. Fortunately, Emily (Kathryn Prescott) is able to disguise herself as her sister, and sits an exam on her behalf. Emily and Naomi (Lily Loveless) get closer, just as Emily has wanted for a long time; but when Emily asks Naomi to accompany her to the college ball, she says no, breaking Emily’s fragile heart. Against her better judgement, and under duress, Emily agrees to partner Katie to the ball instead, and they plan their outfits together. Out shopping, though, they bump into Freddie (Luke Pasqualino) and JJ (Ollie Barbieri), and Katie convinces Freddie to take her to the ball instead. Katie sees a way of regaining her hard-sought status at college. Freddie inadvertently drops a bombshell about Emily and JJ, and Katie hatches a plan, making her sister the ultimate victim. Katie’s scheming results in the mother of all showdowns. But she’s the one who has to face her fears and accept some hard truths, principally that she’s not in control any more."