Set in the fictional town of Kamurocho, the story unfolds across two intersecting timelines—1995 and 2005. In 1995, four friends eager to escape their restrictive lives in an orphanage dive into the yakuza-controlled underworld of 1995 Kamurocho. Meanwhile, in 2005, their friendship is deteriorated, as tensions between the Tojo Clan and the Omi Alliance are at a boiling point.
Akira is widowed and left with a pre-teen stepson. Travelling with him to her late husband's hometown, she meets her odd father-in-law and yet decides to make a go of living and working there. She attends training and joins the railway company where her father-in-law works and her late man dreamt of ending up as a child.
Yuri Ishikawa and her team try to crack unresolved cold cases in Kanagawa Prefecture, Japan.
