Regarding a Certain Unsolved Caseとある未解決事件について

Journalist Rei Kurisu has worked at his company for eight years but has never landed a major scoop, leaving him frustrated with his career. When he learns that the site of an infamous unsolved mass murder case involving an entire family in K City is about to be demolished, he decides to investigate the location.While examining the scene, he discovers a mysterious photograph that seems connected to the crime. As he continues digging into the case, Rei uncovers hidden truths and shocking details about the victims' past, leading him deeper into a disturbing mystery that refuses to stay buried.