Loner Franky starts at Roundview and accidentally challenges Mini's position as Queen Bee. Mini plays the long game and Franky finds herself befriended by the girls, but when she won't conform to what Mini expects of her, she is spat out. Franky meets Matty, who understands and empowers her. Franky stands up to Mini, which inspires Grace to join her. A new gang is formed: Franky, Alo, Rich, and Grace. Franky has finally found friends, but in doing so has started a war with Mini.

Conscious that she indirectly caused Grace's death and unable to concentrate on her mock exams, Franky feels alienated from her friends and smothered by her well-intentioned gay dads, so when drug-pusher Luke reappears, she finds herself drawn to his violent lifestyle; some of it even rubs off on her at home. Counseling is no help, and when Nick tries to intervene when Luke starts another fight and ends up getting hurt, Frank almost relishes it. But after snorting cocaine before enforced sex with Luke, she realizes what a brute he is and is ultimately reconciled with her dads and Nick.

Nick gets a Skype message from Matty in Morocco, telling him to go to a seedy club and ask for 'The Doctor,' a sinister Russian who will smuggle him back to England on a fake German passport for 2,000 pounds. Encountering hostility from his peers who blame Matty for Grace's death, Nick steals the money from his father's bank account but the Doctor cheats him and beats him up. Although she has accused him of being always in his brother's shadow and seen him kissing others, Franky offers a thousand pounds which she says is 'an inheritance' but Nick declares the deal off. However, the pair finally admit to their mutual feelings for each other and have sex; while Nick is in the bathroom afterwards, Franky sees a Skype message from Matty but switches the computer off without answering.

Mini is rushed to hospital but the baby is saved. As the exam results come through and Alex gets ready to spend his gap year in Thailand, Matty apologises to Rich for causing Grace's death. Franky heads for Birmingham to seek out her mother but is told that she is dead by her sister Clara, who returns her to Bristol. At Alex's farewell party Liv makes up with the other girls and Grace appears to Rich for one last kiss. Clara tells Franky that their mother is actually in a psychiatric hospital and takes her to visit. Nick accompanies Matty to the police station to give himself up and Mini has her baby, with Alo offering to support her. Hearing the baby cry Rich turns to the camera to say goodbye to the viewers.