Episode 5 of The Auditors delves deeper into the murky waters of corporate corruption, with the spotlight this time on the company's on-site cafeterias. The episode opens with a disturbing revelation: a series of food poisoning incidents has led to the hospitalization of several employees. Amidst the growing public outcry, the company president orders Shin Cha-il's audit team to investigate the matter internally.

As the team digs deeper, it becomes apparent that the issue is far more complex than simple food poisoning. The cafeteria management had been outsourced to an agency, but the contract had recently expired. This raises suspicions about the circumstances surrounding the contract termination and the subsequent food safety issues.
The audit team's investigation leads them to uncover a web of corruption involving the cafeteria owner, who happens to be the in-law of a high-ranking company executive, Director Yang. It becomes clear that the contract had been awarded through questionable means, and the food poisoning incidents were possibly a cover-up for more sinister activities.
Han-soo, a sharp-eyed member of the audit team, notices an unusual connection between VP Hwang Dae-woong and Seo-jin. While the nature of their relationship remains unclear, it adds an intriguing layer of complexity to the overall narrative.
The episode culminates in a tense confrontation between Shin Cha-il and the contracting department director. Despite mounting evidence, the director denies any wrongdoing. As the pressure intensifies, both Director Yang and the contracting department director tender their resignations, leaving the company in a state of turmoil.
The episode ends with a cliffhanger as Han-soo and Seo-jin theorize that the blackmailer who sent the threatening letter to Shin Cha-il might be an insider. This suggests that the corruption within the company runs deeper than initially suspected, and the audit team may be facing even greater challenges in the episodes to come.