The series takes place years after the events of the Famous Forty and World War II. Dorothy has become an adult. The other characters have also gone through tremendous changes, and are all living in America. They have to protect both lands -- America and Oz from threats such as the returned Wicked Witch of the East, now known as Rebecca Eastwitch, a morally challenged Tik-Tok and more. Time travel occured at one point and had At the series end, it revealed that Dorothy is pregnant with Princess Ozma's son (apparently concieved while she was Tip) who is later introduced in a sequel book.