Kerrie feels trapped. She can't spend another day in her chaotic mother's house. Then Kerrie finds an escape. On the rooftop of a nearby tower block live two castaway teenagers, Mauve and Skip. As Kerrie starts to share their sky-high home, she relishes her new-found freedom. And when a freak fire destroys their towerblock, Kerrie decides to leave the city with Mauve and Skip. She thinks that she can leave her problems behind in Glasgow - but what will happen when Kerrie stops running?