The Zero Degree Zombie Zone

Shy fourth-grader Bakari Katari Johnson is having a bad day. He's always coming up against Tariq Thomas, the most popular kid in their class, and today is no different. On top of that, Bakari has found a strange ring that appears to have magical powers, and the zombies from the ring's fantastical other world want it back! Can Bakari and his best friend Wardell stave off the intruders' attempts, keep the ring safe, and stand up to Tariq and his pal Keisha, all before the school bell rings?