Thirteen-year-old Emily Houchens doesn't have many friends. She spends her time alone in the woods near her house - her safe place, until she finds the body of a young woman. Susanna Mitchell is searching for her sister, Ronnie, who vanished after leaving a late-night bar. The more she discovers about Ronnie's life, the more she realises that her sister began to disappear long before she went missing.
There is a hint of Armageddon in the air. According to the Nice and Accurate Prophecies of Agnes Nutter, Witch (recorded, thankfully, in 1655, before she blew up her entire village and all its inhabitants, who had gathered to watch her burn), the world will end on a Saturday. Next Saturday, in fact.