The students are shocked by the return of Gabriella Wark, and despite her claims that she has turned over a new leaf, she gets a frosty welcome from Kacey, whose hopes of competing in the Commonwealth Games were ended in the accident caused by the trouble-maker. Taking their friend's lead, Lisa and Shaznay mark the returnee out as an easy target. Allie feels uneasy as Vaughan and the boys prepare to visit Olga on her birthday - and with the couple so wrapped up in their own problems, they don't notice Justin and Tiffany are growing closer. Hector finds an ally in Sue - and it soon becomes clear there's a chemistry between them.