Synopsis

The series follows Narumi Risa, a graphophile detective played by Suzuki, who investigates cold cases using handwriting and written characters as her starting point.

In Season 3, a turning point arrives for Risa, who has been holed up in Section 6 (Document Deciphering Unit) of the Metropolitan Police Department’s First Investigative Division Special Task Force deep underground, solving cold case after cold case despite being mockingly dubbed the “Warehouse Witch.” Her longtime partner since Season 1 — hot-blooded, physically-driven detective Yashiro Tomo, is transferred out, and Section 6, which has been operating without a section chief, now faces the threat of being disbanded.
As Risa wallows in low spirits, Mutsu Hinako — an elite career worker with a guaranteed future in the organization — volunteers to take over as Section 6 chief. At just 29 years old, this new boss is young enough to be Risa’s daughter, leaving her unsettled by the age gap. However, witnessing Hinako’s utterly pure-hearted and earnest dedication, Risa finds her spirit renewed and throws herself enthusiastically into tackling the division’s backlog of unsolved cases.