The story of two families living at opposite ends of the freeway. Bess Denyar is a doctor with a posh mother, Margaret, an architect husband, Danny Bright, and 13-year-old twins, Oscar and Edwina, at a private school. Bess is stunned when she learns she's adopted, but even more so when she meets her birthparents, Wayne and Julie Wheeler; and her three siblings: Amber, Kayne, and Brianna. The 'bogan' Wheelers, who head up a drag-racing team in the outer suburbs, are thrilled to discover the daughter they thought they had lost.