The gripping fourth episode of "The Auditors" commences with a fiery turn as Hwang dismisses Cha-il, yet the latter's resolve to push for a directorial audit remains unwavering. However, Hwang's subsequent realization that his authority over the audit department does not extend to firing Cha-il casts a shadow on his actions. His threat to halt construction proves futile against the president's shrewd understanding of Hwang's limitations—the deal is sealed, and the brakes cannot be applied.
Elsewhere, a dramatic twist unfolds as the director, with a surprising air of acquiescence, accompanies the audit team to the police station, only to be swiftly released, his freedom secured by Hwang's intervention, while the union president bears the brunt of accusations.
Within the office's confines, Seo-jin confronts a moral quagmire: to support her uncle or stand with the elderly man and countless others whose lives have been shattered by embezzlement. Meanwhile, Shin Cha-il orchestrates a daring bargain with Hwang: if Hwang rescinds Mi-kyung's Florida transfer, Cha-il will assume sole responsibility for the missing 3.4 million dollars, pledging to reimburse the amount personally within three days, failure to do so notwithstanding.
Cha-il embarks on a quest, seeking answers from Kang Myung-Chul, a fellow auditor within his own construction empire. The trail leads to a revelation—Myung-Chul's cunning maneuver to replace the embezzled funds with his company's legitimate cash, facilitated by his romantic partner and finance team member, Lee Yeon-Ji. This clandestine swap ensured the tainted money flowed into the hands of unsuspecting workers, who unwittingly dispersed it, rendering it virtually untraceable. The intricate web of deceit and its devastating consequences come to life in this intense episode, leaving viewers on the edge of their seats.
When Shin Cha-il's path crosses with Mi-kyung once more, he unfolds a damning photograph, exposing her husband's betrayal. Yet, she stubbornly refuses to acknowledge the truth etched within its frame. As if fate were conspiring against him, Cha-il soon finds himself sandwiched between two menacing trucks, his life hanging in the balance.
Meanwhile, Han-soo and Seo-jin embark on a covert mission, tailing Kang Myung-Chul and Lee Yeon-Ji. Their investigation unravels a sinister plot, as they witness the duo in compromising positions outside a motel, their incriminating images captured on film.
The following day, the audit team encounters a roadblock as Hwang keeps the director locked away in a hotel, phoneless and unreachable. After a futile search, Cha-il receives a cryptic tip, leading him straight to Mi-kyung. This time, he confronts her with irrefutable evidence of her husband's deceit and his impending escape with Yeon-ji and their ill-gotten gains, leaving Mi-kyung to bear the brunt of the blame.
Cha-il alerts the team to Kang Myung-Chul's money laundering scheme, involving the manipulation of funds through the buying and selling of construction vehicles. The quest for incriminating documents leads Han-soo and Seo-jin to the company's premises, only to be thwarted at the last moment by Kang Myung-Chul himself, who snatches the evidence, incapacitates Han-soo, and flees.
After a grueling pursuit, Cha-il corners Myung-Chul, only to be met with a shocking revelation: he doesn't possess the money; Mi-kyung had outsmarted them both. Swiftly, Cha-il apprehends Mi-kyung at the airport, and the police uncover the stash in a distant parking lot. Cha-il triumphantly reports to VP Hwang and the president, outlining their plan to recoup every penny from those responsible, revealing that the crucial tip on Mi-kyung's whereabouts originated from none other than the president.
Han-soo rejoices over their victory, sharing the moment with the elderly man and his grandchildren at a heartwarming family dinner at his parents' restaurant. Yet, Seo-jin's relationship with VP Hwang remains strained, casting a shadow over their celebration.
As dawn breaks on a new day, Cha-il is confronted with another urgent case, this time involving a sinister threat that has construction workers falling ill after lunch, a menacing shadow looming over the company's workforce. The audit team springs into action, urgently advising employees to avoid the cafeteria, their determination unwavering in the face of yet another challenge.
