In Ethiopia, Ageze has unearthed an ancient device that can make predictions. It tells him: there is a date, there is a place, there is a moment when it will happen. A disaster that will change everything.Halo Moon loves stars, and the night sky is full of them in her remote Yorkshire village. It's a place where nothing interesting ever happens, let alone a catastrophe.So when a stranger appears at the end of a near-impossible journey and tells her lives are at risk, she can barely believe it. But if she doesn't help Ageze, everything and everyone she knows might disappear for ever