Quinny has a lot to say. Hopper gets to the point.

Quinny has one speed: very, very, extra-very fast. Hopper proceeds with caution.

Quinny has big ideas. Hopper has smart solutions.

Quinny and Hopper couldn't be more different. They are an unstoppable team.

But when summer ends, things suddenly aren't the same. Can Quinny and Hopper stick together in the face of stylish bullies, a killer chicken, and the brand-new Third Grade Rules-especially the one that says they aren't allowed to be friends anymore?