Can you keep a secret? What if it is something really terrible? A quiet town in the American Midwest is about to be rocked to its core. As three young sisters come to terms with what they are - being a witch is a real problem in a churchgoing, God-fearing family - a new neighbour with a mysterious past hints at trouble to come. However, the scary woman stalking them could be the least of their worries, as their spellcasting draws the attention of something ancient and evil.