Emma Kate and her best friend share many activities, such as homework and soccer practice, and even have their tonsils out at the same time, all the things best friends do. But there is more to this best friend than meets the eye.
The students in Mrs. Green's class are excited to hear they will be having a substitute teacher, but their plans for partying and having fun all day change when they see who the sub is and what he has planned for the day.