"Dark, dangerous things happen around the Hollow sisters. ever since they disappeared as children - only to reappear a month later, with no memory of what had happened to them - off, eerie occurrences follow in their wake. When Grey, the eldest, goes missing again, Iris and Vivi are left to figure out the mystery - but they aren't the only ones looking for her. As they brush against the supernatural, Iris realises that the world that returned them ten years ago might be calling them back. But just how much horror lies beneath the surface?"- Achterflap.