Five friends arrive back in Eternal Springs, the small town they all fled after high-school graduation. Each of them is drawn home by a cryptic, scrawled two-word letter: You promised. It has been fifteen years since that life-changing summer, and they're anxious to find out why Brandi called them back, especially when they vowed never to return. But Brandi is missing. She'd been acting erratically for months, in and out of rehab, railing at whoever might listen about magic all around them. About a power they can't see. And strange houses that appear only when you need them...