Best friends Sophie and Tye are watching TV when a car crashes through the living room wall. The driver and passenger are twins, Harry and Gemma. Next door neighbour, eleven-year-old Issy, witnesses the accident. In the aftermath, Tye is thrown into a coma, Gemma's dark past begins to haunt the present, and Sophie starts to fall for Harry - but how can she, when he was the driver who nearly killed her best friend? And Issy, meanwhile, hides a terrible secret ...