California high school students Kaida, Zeke, and Joy fall into a parallel universe in which all resembles their normal lives except that there is no medicine nor health care, which could mean big trouble for Joy, whose arm was injured in the accident that started their troubles.

At nearly fifteen years of age, Joey Harker learns that he is a Walker, able to travel between dimensions, and soon joins a team of different versions of himself, each from another dimension, to fight the evil forces striving to conquer all the worlds.

In 2083, chocolate and coffee are illegal, paper is hard to find, water is carefully rationed, and New York City is rife with crime and poverty. And yet, for Anya Balanchine, the sixteen-year-old daughter of the city's most notorious (and dead) crime boss, life is fairly routine. It consists of going to school, taking care of her siblings and her dying grandmother, trying to avoid falling in love with the new assistant D.A.'s son, and avoiding her...

Uses images from the original Star Trek television series to introduce words that are opposite (or at least contrary) in meaning.