Season 1

Makoto Tagusari, a determined detective, and his younger brother Minoru, a forensic medical examiner, are bound by a tragic past—the brutal murder of their parents years earlier; as the statute of limitations on the cas…

Haruko’s investigation into a specific murder case uncovers that the victim was living under a false identity, which shifts the motive toward a potential revenge killing. This revelation complicates the case for the Tag…

The brothers find their parents' suspected killer comatose in a hospital. As they investigate an arson-murder case, Minoru uncovers key evidence.

Makoto and Minoru find a key and a cryptic note among Tsuda's belongings. Meanwhile, the hunt for a fugitive takes a grim and unexpected turn.

A hidden handgun leaves Makoto and Minoru facing difficult questions, and a bizarre confession leads police into an increasingly baffling investigation.

The handgun leads Makoto and Minoru to their father's factory — and a possible link to the yakuza. A fatal car accident reveals foul play.

Minoru investigates a suspicious death and hunts for Tsuda's missing notebook as Makoto's ties to a city welfare counselor raise red flags.

Makoto and Minoru restore Tsuda's notebook, but Koike seizes it. Makoto confronts him — and the identity of their parents' killer begins to surface.

After a shocking discovery, the Karashimas flee and a devastated Minoru shuts down. Makoto steps up to track them, suspecting someone aided their escape.

The truth behind their parents' 31-year-old murder is finally revealed — but as Minoru reaches a breaking point, the brothers face an impossible choice.