The puzzles get tougher and even more deadly as Kaito Daimon continues his battle against the power hungry Givers of the POG. And with one team member already switching sides, will Kaito have what it takes to keep solving the deadly puzzle traps put before him and reach the fabled Puzzle of God? More importantly, will he be able to solve the puzzles AND maintain his sanity?
The school adventure story revolves around Kaito, a puzzle-loving freshman at the private high school named "Root Academy." He is selected as a candidate for "Phi Brain" for his extraordinary mental skills. One day, he and his childhood friend Nonoha tackle the "unsolvable puzzle" hidden in the underground ruins near the school. They are guided by the mobile device given to Kaito by the student council president.