Zoë is haunted by visions: A black house, a little girl and a desperate plea for help. Is it a dream - or a message? When her best friend vanishes, Zoë discovers a connection between her visions and a terrifying global conspiracy. Now Zoë must risk everything to find her friend and unravel the mystery. Her journey will take her across continents, to the end of the world and into the Winter - a place that holds the secrets of the past, and the keys to the future.