The story revolves around female protagonist Nina Yamada, a seventh grader who accidentally swallows the Crystal Pearl thinking it was candy. The pearl is the goal of a sorcery examination where the students must retrieve it to pass. But since Nina has swallowed the pearl, she is now the target. Fortunately for Nina, two of the examinees decide to protect her from the other students while they work on a potion to extract the pearl from Nina..

"A Del Rey trade paperback original"--T.p. verso.