Trace ~ Men of the science school ~ (2019 - 2019)

Reiji Mano (Ryo Nishikido) and Nonna Sawaguchi (Yuko Araki) gets asked by Ryohei Toramaru to do some DNA tests for a murder incident of a doctor at an inauguration party. It turns out that he had apparently fallen off the balcony of his room and was discovered by his daughter.

Reiji Mano (Ryo Nishikido) receives a request to go ahead with some DNA tests of a young girl who may have been strangled to death.The girl’s body had been discovered by police in a forest, after reports of her disappearance from her mother.

Reiji Mano (Ryo Nishikido) and Nonna Sawaguchi (Yuko Araki) attend a murder site, after a body is discovered at an apartment by the owner, after receiving reports from people, that they are unable to get in contact with the individual. From evidence which are left at the site, there is a high possibility that the killer had used a deadly knife.

Reiji Mano (Ryo Nishikido) receives a request from Ryohei Toramaru for a diagnoses. It turns out that a body had been discovered near a mountain road. Meanwhile, test results reveal that the victim had been serious hit in the head.

Reiji Mano (Ryo Nishikido) receives a call from somebody with a desire to talk about his brother. When Reiji goes to the location to meet the mysterious person from the call, nobody turns up. Meanwhile, a body of a homeless man is discovered at a riverbed.

Reiji Mano (Ryo Nishikido) discovers that his sister who was murdered 25 years ago as a high-school student was pregnant, as he tries to gather more evidence related to this from the school teacher. Meanwhile, Nonna attends a drinking party after being invited by staff members from work.

Reiji Mano (Ryo Nishikido) has to supervise a shocking case which involves a vicious murder of one’s friend. In turns out that the suspect had murdered the victim with a knife after a serious quarrel.

Reiji Mano (Ryo Nishikido) tries to attain information regarding his sister from a high-school teacher. Meanwhile, despite all his efforts, Reiji feels deeply troubled as he is unable to uncover the clues which may lead to solving the complicated case.

Reiji Mano meets up with a school teacher in order to uncover the truth behind a murder incident which took place 25 years ago. He manages to attain new information about a former tennis player who fell off from a pedestrian bridge, which may lead to some valuable clues.

Reiji Mano who is now trying desperately to uncover the truth about the family murder, goes to visit the president of a food production company. However, a terrible gas explosion eads to shocking consequences.