Kara and her classmates are excited to have a sleepover at school. Julie has brought a game called "The Spirit in the Glass," which she claims can help players communicate with ghosts. However, Rose and Malou think the game is too scary. When thunder begins to rumble, Kara starts to wonder if she finds the situation funny anymore, either. This is the thirteenth book in the popular series about Kara and her friends. The stories focus on themes of friendship, school experiences, and growing up. Each book can be read independently from the others.