Twelve-year-old Zuzu Santos doesn’t want a robot. She and her best friends, otherwise known as “the Valleycats,” would rather explore Bright Valley on their own. But then Zuzu meets Snap, a know-it-all guardian robot with a limited battery life and an abundance of hope.

Bright Valley Subsidized Camp #5 is not a perfect place to live. It’s dusty, there are no trees to provide respite from the beating sun, the trailers are falling apart, and the water supply is heavily rationed. But to twelve-year-old Zuzu Santos and her three best friends, Bright Valley is home.

When Zuzu’s dad loses his job at Lockwood, the corporation that controls everything from rations to education, he isn’t given money or food or water as severance, but a dated, first-generation robot. They do not provide a working charging station. Zuzu names the robot Snap, and he soon becomes part of the Bright Valley family. But Snap’s battery is dwindling every day, and though Snap is prepared for his inevitable reset, Zuzu isn’t. She would do whatever it takes to keep Snap alive. The problem is, Snap would do the same for Zuzu and her friends, no matter the cost.