Park Bo-gum's character finds himself in dire straits, becoming a wanted fugitive accused of a violent rampage and drug use. This shocking turn of events has driven the show's ratings to 5.5% nationwide, according to Nielsen Korea.
In the 12th episode of JTBC's weekend drama 'Good Boy,' aired on the 6th, the special investigation team successfully uncovers an unprecedented amount of illegal funds, triggering the madness of Min Joo-young, played by Oh Jung-se. Min Joo-young, a former customs officer, is driven to madness upon discovering that a gold watch given to him by smuggler Oh Bong-chan (Song Young-chang) is fake. In a fit of rage, he kills Oh Bong-chan with a brick, and despite losing a massive cash container, he calls Yoon Dong-joo (Park Bo-gum) to taunt him, saying, "I feel like I'm back to the beginning. I underestimated you, and I'll push you further into a corner." His face is filled with the same manic joy he had when he killed Oh Bong-chan and fulfilled his desires.
A tragic incident occurs when a 16-year-old student dies after consuming a new drug called 'Candy,' distributed by Min Joo-young in Inseong City. Yoon Dong-joo, who arrives at the scene, is ambushed by Oh Jong-goo (Jung Man-sik) and his gang while his partner Shin Jae-hong (Tae Won-seok) is temporarily away. Oh Jong-goo, who was Yoon Dong-joo's former boxing coach, exploits his knowledge of Yoon's condition to brutally attack him, leaving Yoon Dong-joo battered and unconscious.
This was all part of Min Joo-young's scheme to trap Yoon Dong-joo. Shin Jae-hong had left due to a text about a denied loan, orchestrated by Oh Jong-goo, who then assaulted the lone Yoon Dong-joo. Min Joo-young forcibly injects Yoon Dong-joo with a lethal dose of drugs, chillingly saying, "It's been fun. Die happily."
Despite reaching his limits due to drugs and beatings, Yoon Dong-joo manages to hold on, aided by an antidote secretly given to him by Ma-gwi (Lee Ho-jung), who resents Min Joo-young for breaking their agreement not to sell 'Candy' to women and children. With newfound strength, Yoon Dong-joo escapes from the container where he was held captive.
However, Yoon Dong-joo is soon mistaken for a drug-crazed assailant wielding a weapon in a crowded street, leading to a nationwide manhunt. Min Joo-young places a hefty bounty on him and instructs Police Chief Jo Pan-yeol (Kim Eung-soo) to do nothing, even gifting him a gold watch. This explains why local thugs and gangsters are after Yoon Dong-joo, while the police remain inactive.
Yoon Dong-joo barely manages to hide in the parking lot of Kim Jong-hyun's (Lee Sang-yi) apartment. Kim Jong-hyun, having tracked Yoon's movements via CCTV, finds him just in time. Although Yoon's condition is worsening, going to a hospital is impossible with both Min Joo-young's gang and the police on his trail. Kim Jong-hyun strikes a deal with his brother, prosecutor Kim Seok-hyun (Kim Seo-kyung), surrendering family company shares and wealth in exchange for a temporary hideout and medical care. The special investigation team, upon seeing Yoon Dong-joo's battered state, is filled with both despair and anger.
In a bold move, Ji Han-na (Kim So-hyun), Yoon Dong-joo's lover and colleague, takes up arms for his sake. Her determined expression as she heads alone to Min Joo-young's penthouse at Geum Moon Central City conveys her resolve to fight to the end, leaving viewers in suspense. With only four episodes left, all eyes are on how they will stop Min Joo-young, who has once again overturned the rules with ruthless tactics.