Ad le and her younger brother Axel grew up in a hamlet in the spectacular mountains of the Ard che region in southeast France. Ten years later they have returned to their childhood home and Ad le now drives the school bus. Ad le is desperate to keep the secret of her pastof when she was a boy. No one recognises her here now but teenagers have a way of getting to the truth...When a terrifying snowstorm strands the bus on the mountain Ad le and her passengers take shelter in a cave and thats whe