Michio Iruma is a quirky, former lawyer turned judge at the Tokyo District Court's Ichikei. He is known for his unconventional methods and thorough investigations. Sakama Chizuru, a straight-laced, elite judge, joins Ichikei to improve its performance. Their first case together involves investigating the truth behind an assault case linked to a suspicious suicide.

The District Court team led by Iruma, plays an amateur baseball game against the District Prosecutor's team. Later, Sakama attends a party hosted by Supreme Court Judge Hidaka, where she is pressured to monitor Iruma for any problematic behavior. Meanwhile, Ichikei's manager Komazawa assigns a sensitive child abuse case involving a celebrity.

Department head Komazawa assigns a complex case of negligence resulting in death. The case involves Fujishiro Shogo who allegedly killed someone after an argument. Iruma presides over the trial, where Fujishiro is shocked to see Komazawa, who had previously judged him 18 years ago.

Iruma meets Sakama's sister, Ema and asks her to observe her sister in court to understand what kind of judge she is. Meanwhile, Ichikei's chief Komazawa assigns a juvenile case. The defendant, 17-year-old Mochizuki, is accused of stealing 50 million yen and scattering the cash when caught. Iruma suggests Sakama preside over the case, and she accepts.

Ichikei receives an indictment for an assault at a ballet company. The defendant Makihara, a choreographer, allegedly pushed former trainer Yaguchi during a fight, causing a severe head injury. Ishikura is surprised to learn that ballerina Kyoko, his first love, is involved.

A new case involves Kishida, a six-time convicted thief who stole 1.13 million yen. Kishida tried to escape on a stolen bicycle but collided with a newspaper delivery man and subsequently turned himself in. Iruma, noticing inconsistencies in Kishida's story, decides to investigate the case.

Iruma's last case as a lawyer, the Higashimaru Electric murder case, resurfaces.

Yukinori and Yui join Ichikei as trainees and witness a merged trial where Shiokawa Keiko, previously caught shoplifting, is now also charged with assaulting Fumie Yamadera, her former teacher.

In the "Setagaya Housekeeper Murder Case," defendant Takami Azusa claims that the death of her employer who fell from a damaged balcony, was an accident and denies knowing about an inheritance left to her.

In a panel trial at Ichikei, defense attorney Aoyama takes on the case of "Nameless Gonbei," who refuses to disclose his identity, involving an assault on a teenager amid a conflict with boys throwing stones at homeless people.

A scandal erupts when a magazine accuses Iruma of colluding with lawyer Aoyama to issue dubious acquittals, raising concerns as Iruma faces the end of his judicial term.