Tension rises among investigators as information of a large-scale drug trade comes in. Veteran detective Tokita and his rookie partner Shiina sit in front of a warehouse in car number 13. Shiina begins to tease the carefree Tokita. In the dispatch room, Misato begins to size up newcomer Arira. As the investigation stalls, Isayama and Ichijo, hired on an illegal website, meet in a warehouse.

At the stakeout, a bored Tokita and Shiina talk about Arira from the dispatch room. Misato discovers Arira's violent side and tries not to upset her, but accidentally reveals a big secret. At the warehouse, Isayama and Ichijo are puzzled by the abducted Mari. Ichijo tries to give something to stimulate Isayama, and Tokita realizes he has lost something. The drug deal quietly moves along.

Tokita loses his gun and is distraught. Shiina teaches him how to cool down emotionally. At the warehouse, Ichijo argues with Isayama about how to handle Tokita’s gun that he picked up. In the dispatch room, Arira, who learned about Misato's husband's affair, embarks on an investigation. Isayama accidentally fires the gun he was playing with, and the incident moves in an unexpected direction.

Tokita and Shiina find no one at the warehouse, but bloodstains remain. Tokita is rigorously questioned by his boss for losing his gun. Elsewhere, Isayama, Ichijo, and Mari run away with the dying Yamakura. Shiina encounters his old instructor and gets wrapped up in a bothersome issue. While Arira investigates Misato's husband's affair, Misato tries to break up with her lover.

Tokita and Shiina return to the warehouse in search of the gun. Isayama, Ichijo, Mari, and the dying Yamakura are back for the drug deal. In the dispatch room, Misato sighs as Arira has disappeared. An awkward conversation follows with the newly arrived and bizarre Sato. Arira thinks about quitting her job. As the drug deal is approaches, a big incident occurs in the warehouse.

At the warehouse, the death of Yamakura leads to Isayama and Ichijo’s dispute. Mari runs away. Unaware of the situation, a depressed Tokita tells Shiina his decision to quit his job. Meanwhile, Misato and Arira get a strange phone call in the dispatch room. From there, the incident unfolds in an unexpected direction! Where's the gun Tokita lost? How will the biggest drug deal in history conclude?

Detectives Tokita and Shiina team up to arrest Yakuza boss Orihara. Tokita reveals that he has has incontinence issues, which excites Shiina. They turn off their radios and leave to meet the woman Tokita has a crush on. Misato and Arira bully newbie Yotsukado. Orihara realizes he's being chased by the police and mafia. Headquarters becomes chaotic when the arrest goes awry.

Tokita and Shiina desperately try to track down Orihara. Tokita suggests that he, Shiina, and Fuyuka run away. Orihara tries to hide in his retired boss, Jin's house, who messes with Orihara. The Chinese mafia try to chase Orihara. Misato tries to tease Arira after learning her fiance is a former convict. The police and the mafia chase fleeing detectives and Yakuza. The situation only worsens...

Fuyuka is taken away and Tokita and Shiina search for her while evading the police. Arira decides to call off her engagement, causing a commotion. Yotsukado faces misfortune and becomes the target of displaced anger. Orihara plans his escape but is cornered by the Seiryu gang. Tokita receives a mysterious call offering to return Fuyuka. A gripping battle of good-for-nothing individuals unfolds!

Shiina accidentally shoots an undercover investigator. Conflict erupts between the Police Department and the Ministry. The Chinese mafia think the Yakuza shot their member and launch an attack. Orihara wants to escape and is presented with an unexpected condition. Headquarters pursue Tokita and Shiina. Misato and Arira try to contact them. Tokita and Shiina are burdened with an unexpected mission!

The Yakuza contact Tokita offering to overlook his mistake if he caught Orihara. An unexpected opportunity arises after he makes contact with Orihara and has to transport drugs. Orihara and his team go undercover to deal with the Chinese mafia, but Jin discovers a wiretap. Ren learns of Orihara's plans to escape alone. Arira gets angry about Misato’s personnel affairs, leading to a big fight.

Failing to seize the drugs and arrest Orihara, Tokita and Shiina disappear. Tokita searches for Fuyuka, hoping to see her one last time. Misato and Arira are on edge and a retirement scandal erupts. Orihara has little time to make a deal with the Chinese mafia. Tokita and his team escaped and the investigation is at a loss. What kind of Christmas night will they have...?