Episode 7 of "Trigger" resumes at the tense climax of the school shooting scenario. Prior to reaching the school premises, Lee Do receives a pivotal call from Officer Jang, updating him on the unraveling identity of Moon-baek. The latter's presence at every address listed on the address books hints at his active involvement in the distribution of firearms.
Inside the school, tension mounts as Gyu-jin trains his gun on Seong-jun, yet mercy prevails as he refrains from pulling the trigger. Lee Do, with strategic calm, defuses the situation and secures the weapon from Gyu-jin's grasp. Moon-baek, from a corner, offers a thumbs-up to Lee Do, who is consoling Gyu-jin. Following the harrowing event, Gyu-jin and Yeong-dung are apprehended by the law. Gyu-jin's mother's heartbreaking breakdown ensues as she watches her son being escorted to the police cruiser.
Despite Lee Do's instruction to Detective Seo to apprehend Moon-baek post-incident, the latter slips away into the mob like a ghost. Lee Do's memory jogs—Officer Jang had earlier revealed Moon-baek's identity to be a fabrication, as the Moon-baek employed at the defense contractor firm was an entirely different individual. Upon arriving home, Lee Do discovers a mysterious package awaiting him, accompanied by address lists bearing his own name.
Elsewhere, after conferring with fellow gang leaders, Seok-ho resolves to terminate his deal with Moon-baek and promptly reaches out to Lee Do. Concurrently, Chief Yoon unexpectedly reinstates Lee Do ahead of his three-month suspension, tasking him with joining the investigation team.
Lee Do's meeting with Seok-ho unravels more secrets: the cache of guns discovered in a storage room, Mr. Kim's shadowy presence, and Jung-man's men lurking nearby. Seok-ho pledges cooperation, contingent on Lee Do's assistance in extricating him from the gun-related mess.
Meanwhile, police officers tasked with collecting the guns are astounded to learn that another group, posing as law enforcement, has successfully seized half of the firearms from the designated delivery address. In a meeting with superiors, Chief Yoon is mandated to transfer the case to the Joint Investigations Office, which is swiftly establishing its headquarters.
The stakes have never been higher, and the web of deceit and danger continues to tighten around Lee Do and his allies.
In the confines of a bustling hospital, a young nurse finds herself the target of bullying due to her alma mater's lesser reputation. The head nurse, exuding contempt, subjects her to unfair treatment, assigning her to cover shifts for others while arbitrarily granting them time off. Meanwhile, the media is ablaze with discussions on firearms, sparking debates about the potential legalization of gun ownership in Korea.
From the penthouse, Moon-baek and his team monitor these developments, their focus unwavering on tracking gun usage. As more individuals gain access to weapons, Moon-baek is surprisingly disheartened by the lack of violence—no shootouts on the streets, no confrontations with law enforcement. Chief Yoon, convinced of Moon-baek's involvement in the proliferation of guns, secures permission for an investigation into his activities. The joint task force will scrutinize Moon-baek, while Chief Yoon and his officers race against time to confiscate as many firearms as possible.
Elsewhere, Jung-man and his cronies hold onto their newly acquired guns. Mr. Kim, desperate to pressure Jung-man into targeting Seok-ho, finds resistance from Jung-man, who bids his time. Earlier, Seok-ho had voiced ambitions to usurp Mr. Kim's businesses, prompting Jung-man to devise a plan. Armed with Mr. Kim's phone, Seok-ho intends to extract data containing a list of Mr. Kim's clients, tasking Jung-man with procuring Mr. Kim's fingerprints.
Lee Do lurks around Jung-man's territory, driven by Seok-ho's promise to facilitate his access to Mr. Kim. Believing Jung-man holds the key to Mr. Kim's whereabouts, Seok-ho orchestrates a scheme to lure Jung-man into revealing him. As dawn breaks, Jung-man and his gang venture out to exhume hidden graves, unaware that a detective and Seok-ho's team are hot on their trail, ready to exploit any slip-up.
Seok-ho, calculating, plans to use the police as pawns to eliminate Jung-man. However, Jung-man is one step ahead. After their grave-digging expedition, Jung-man and his men follow their routine of visiting a public bathhouse. Seok-ho's men abruptly interrupt their soak, informing Jung-man that Seok-ho awaits Mr. Kim's fingerprints.
Amidst the chaos, a figure exits the bathhouse, bound for Seok-ho's club. Simultaneously, Seok-ho receives a message from Jung-man announcing his impending arrival. Police encircle the club, tension thick as they anticipate Jung-man's capture. But to their astonishment, the individual who enters is none other than Mr. Kim. Jung-man's cunning plan unfolds—he sent Mr. Kim to confront Seok-ho while ambushing the henchmen assigned to watch him at the bathhouse.
Thus, in a web of deceit and intrigue, Jung-man expertly manipulates both Seok-ho and the authorities, turning the tables with his strategic maneuvering.
