10 years ago, two girls' lives changed forever. Now one of them is ready to tell their story. The first memory I have of you is all knickers and legs. You had flipped yourself into a handstand and couldn't get back down. We became best friends, racing slugs, pretending to be spies - all the things that children do. 10 years later, 18-year-old Ravine Roy spends every day in her room. Completing crosswords and scribbling in her journal, she keeps the outside world exactly where she wants it: outside. But as the real world begins to invade her carefully controlled space, she is forced to finally confront the questions she's been avoiding. Who is her mother meeting in secret? Who has moved in next door? And why, all those years ago, when two girls pulled on their raincoats and wellies and headed out into the woods, did only one of them return?