故事发生在私立学院的解谜部之中，井藤野乃叶（清水香里 配音）是解谜部的创始人，解谜部以解开世界各地难解之谜，参加全国高中生解密选手赛为目标活跃在校园之中。 个性阳光开朗，运动万能的大门界人（浅沼晋太郎 配音）、长相凶恶貌似不良少年的逆之上住门（福山润 配音）、外表十分可爱但内里却腹黑至极的丘比克（宫田幸季 配音）、学生会会长轴川总司（石田彰 配音），在解谜部中汇聚了各路高智商大神，其中，大门界人的出色表现吸引了神秘智慧集团POG的关注，他们通过暗中操纵，使得大门界人一行人开始挑战一个名为“贤者之谜”的危险游戏。
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