12-year-old Noah loves to play computer games. And he’s good at it.

One day, he wakes up in a place he doesn’t recognize. He doesn’t remember how he got there, and he has no idea how to get back home.

The only thing guiding him is a watch that sends him messages.

In this book, the watch wants him to find a diamond in a world full of monsters. Is Noah up to the task? And what happens if he fails?