This boy i hardly know

Sixteen-year-old Dusty is smart, talented and fiercely protective of her younger sister Poppy. They've been bounced from foster carer to foster carer, until one day the unthinkable happens: Dusty and Poppy are separated. Dusty is sent to a children's home in a different town; Poppy to a family hundreds of miles away. No one can say when they will see each other again.