「カルデアの未来は私たちが守るとも―――
　え？　胡散臭い？　心外だなァ！」

秘密裏に活動しているというカルデア特捜班。
推理のエースとベテラン諜報員、お目付け役の班長。
今日も人知れず事件を解決……しているかもしれない。

"We have been entrusted with Chaldea's future.

What? Suspicious?
You cut me to the quick!"

The Chaldea Special Investigation Unit is said to be working behind the scenes. The team consists of an expert in deduction, a veteran secret agent, and a squad leader who is also the supervisor.
Together, the team works in secret to solve mysteries...maybe.