A male corpse is discovered with a smashed face and burned hands. Strangely, the cause of death is determined to be strangulation. When Detective Kaoru Utsumi attempts to corroborate the victim’s ex-wife’s alibi she discovers the mysterious neighbor and only a few small clues to help her disprove a seemingly "airtight" alibi...

The special is set 3 years prior to the drama series, with the story being related to a murder case that was partly referenced in the original show. Detective Kusanagi is looking to solve a murder mystery, and he gets back in touch with his former badminton teammate, the brilliant professor Yukawa Manabu.

A spin-off from popular Japanese TV series "Galileo". Episode XX tells the story of female detective Utsumi Kaoru's final case before she went to Oklahoma for further training.

Masaharu Fukuyama reprises his role from 2008's "Suspect X," playing the physicist-cum-detective Manabu Yukawa. The scientist-sleuth arrives in an oceanside town to speak on a panel. But when a man turns up dead outside the inn where he's staying, Yukawa begins to unravel the connections that tie the victim to the activist daughter of the innkeepers, and a precocious boy who first appears on a train—and keeps popping up. It's a Sherlock Holmes mystery with an environmental twist, and one that should please fans of a classic whodunnit.

Physicist Manabu Yukawa returns to Japan from America. Detective Kaoru Utsumi visits him and talks about a case. The case is about a popular girl in a town who disappeared and, several years later, her body was found. A suspect was arrested for her murder. That suspect was previously arrested for another girl's murder, but he was released due to a lack of evidence. Detective Shunpei Kusanagi investigated the prior murder case. The same suspect was then released due to a lack of evidence for the most recent murder case. The released man returned to his town, where everybody hated him. On the day of the autumn festival parade, the man was killed. Physicist Manabu Yukawa, Detective Kaoru Utsumi and Detective Shunpei Kusanagi work together on his case.

Four years before Silent Parade (2022), Yukawa and Kusanagi investigate the murder of a writer after a video found in his possession piques Yukawa's interest.