Jessa has been raised to be the “perfect girl.” She is unfailingly polite, never rocks the boat, and always follows the rules—no matter what. Her friends love to give her a hard time for being such a goody-two-shoes, but Jessa likes it this way. She knows what's expected of her, and she's happy to be the person her parents (and society) want. When a freak storm takes out the power during a sleepover at Jessa’s creepy, old house, things go south before the pizza gets cold. Her friends are at each other’s throats, unexpected guests keep showing up (some more welcome than others), and it’s not just her brother serving up jump scares. A killer looking for the perfect girl has targeted Jessa, and she’ll have to reject everything she’s been taught if she wants to keep herself—and her friends—alive until sunrise. Who knew perfection could be so dangerous?