Twelve-year-old Joe Warden isn't happy. Sure, he's rich, but his parents don't care about him. His grandmother should make everything better, except that Joe's granny is a nightmare. She's not just physically repulsive, she's horribly mean. Everyone thinks she's just a dotty old woman, but Joe knows the truth. He's seen behind her mask and glimpsed the wicked glimmer in her eyes—she is pure evil. And now she's out to get Joe, unless he can stop her and her band of nasty grannies first.