Curse of the Akoma stone

"Kwame and his friends are excited to participate in the Nkonyaa Games -- a series of magic competitions! As the games begin, a mysterious new teacher named Elder Z arrives. Soon after, a spell is cast on two students, trapping them in stone. And no one knows how to break it! The evil Boni calabash tells Kwame he must enter the Cursed Realm to save his classmates. But can Kwame trust the green calabash? And who cast the forbidden spell? Could it have been Elder Z?" --