Tailing, bugging, stakeouts...this riveting human drama realistically portrays the work of private detectives, charting the growth of a group of trainee detectives.

University student Tasuku graduates from university without a career path planned.
Returning home, he finds his father Jinpei has abandoned him, leaving behind a letter reading: “Congratulations on your graduation! I’m graduating from being your father!”

Once a best-selling mystery author, Jinpei blew his entire fortune, leaving behind only mountains of debt. With no evidence of foul play, the police refuse to investigate his father’s disappearance, and Tasuku eventually ends up at “Joker Detective Agency” after finding their business card in one of Jinpei’s novels.
Unfortunately, the cost of investigating the disappearance is far beyond Tasuku’s means.

Troubled, Tasuku’s eye’s fall on a poster looking for new students at a school for detectives. He makes the decision to become a professional detective and search for his father himself.

One day, whilst practicing tailing a suspect, he gets sidetracked saving an old woman and loses his mark. He’s later reprimanded by his teacher who tells him “90% of a private detective’s job is to investigate affairs, uncover people’s secrets and weaknesses. Being resented by people is par for the course! If you want to be a good person, this job isn’t for you.”

Compared to the heroic detectives in his father’s book, the reality of the job comes as a sharp shock to Tasuku. On top of this, the classmates he has to work with are an overwhelmingly eclectic mix of people from different ages and backgrounds, leading them into unforeseen trouble on almost every case. At this rate, will Tasuku ever become a full-fledged detective?

尾行、盗聴、張り込み…リアルな探偵描写と
“探偵の卵”たちの成長をスリリングに描いたヒューマンドラマ!

大学生の匡（たすく）は就職先が見つからないまま卒業式の日を迎えていた。家に帰ると父の迅平（じんぺい）が『大学卒業おめでとう。父さんも、お前から卒業します』という手紙を残して失踪していた！迅平はかつて売れっ子の推理小説家だったが、実は財産を食いつぶし、莫大な借金を残していた。事件性のない失踪のため警察は捜査をしてくれず、匡は迅平の小説に挟んであった名刺を頼りに「ジョーカー探偵社」にたどり着く。しかし、失踪調査には莫大な費用がかかる。困った匡は探偵学校の生徒募集のポスターを見つけ、自身がプロの探偵になって失踪した父を見つけ出すことを決意する。
ある日、街中で尾行の実習をしていた匡は、急病の老婆を助けているうちに尾行の対象者を見失ってしまう。教師に「現実の探偵の仕事は9割が浮気調査、人の弱みや秘密を暴くのが仕事なんだ。人から恨まれることは当たり前。善人になりたいなら探偵など辞めろ！」と叱られる。父の小説に描かれていたヒーローのような探偵とは全く違う現実に打ちのめされる匡。さらに探偵学校のクラスメイトは年齢も経歴もバラバラ、変わり者ばかりで、毎回予想もしないトラブルに巻き込まれることに…果たして匡は一人前の探偵になれるのか？