Zach Davidson is an ordinary seventeen-year-old boy, focused mainly on running track and hanging out with friends and girls and parties, when, somehow, he and classmate Andy Traylen begin to hear each other's thoughts. Their personalities have somehow become wired together. But it doesn't take long for Zach to figure out that this fusion has a very dark side, and that breaking the link might be imperative for both boys to stay sane.

But is separation even possible-without one of them dying?