Is it wise to ski without an adult on the mountain? Barney and Hattie, the Frank twins, are usually with an instructor or a parent, someone who can guide them and keep them safe. But on a ski trip with school friends, they become over confident, take a risk and go off unaccompanied. What are they trying to prove? Who are they trying to impress? What happens when the group of friends plans to ski alone in forbidden territory? Will they work as a team? Who will be the leader? If something goes wrong, will anyone know what to do? And can you be sure that you are ever alone? In times of danger, imaginations can run wild.