金田一一（はじめ）は不動高校に通う高校生。いつもはひょうきんで少しぐうたらな少年だが、
ひとたび事件が起こると大人顔負けの鋭い洞察力を発揮し、快刀乱麻を断つがごとく謎を解いてゆく。
実は彼は名探偵・金田一耕助の孫なのだ。次から次へと起こる惨劇、迫り来る死の恐怖、
そして暴かれる過去の悲劇…しっかり者の幼なじみ・七瀬美雪を良きパートナーに、
彼は今日も不可解で恐ろしい事件に立ち向かってゆく。警視庁捜査一課の警部・剣持勇、
本庁きってのエリート警視・明智健悟、天才的な犯罪者・地獄の傀儡師など、
一と美雪の他にも個性的な人物が数多く登場する。
どんな謎でも解き明かし、必ず真犯人を暴き出してみせる。
じっちゃんの名にかけて！

Hajime Kindaichi is a student at Fudo High School. He’s facetious and somewhat lazy, but when a case arises, he demonstrates keen observational skills that would put adults to shame as he swiftly unravels mysteries with ease.
As it turns out, he’s the grandson of the great detective Kosuke Kindaichi. Confronting tragedy after tragedy, the fear of looming death, and revelations of past sorrow, Hajime once again faces an unsolvable, horrifying mystery, with his reliable childhood friend, Miyuki Nanase, as his faithful partner. Many other unique characters come into the mix, including Inspector Isamu Kenmochi of the Metropolitan Police Department's First Investigative Division, the elite Superintendent Kengo Akechi, and the genius criminal, the Puppeteer from Hell.
He can solve any mystery and always exposes the true culprits, all in the name of his grandfather!