‘Cha Gunmu,’ infiltrating the after-party of L Company’s shareholders’ meeting to uncover clues about Red Diamond, crosses paths with ‘Yeon Taeoh,’ the youngest son of the Yeonsun Group and a talented racer. In pursuit of the target, Gunmu intervenes when Taeoh unknowingly consumes drugged alcohol, causing him to miss the target. Within the hotel where the affected Taeoh rests, an unusual event unfolds. “Why don’t you take responsibility to the end?” Helplessly entangled in Taeoh’s actions, Gunmu, repulsed by his arrogant demeanor, leaves the hotel room swearing never to encounter him again. However, learning that the target, Red Diamond, has ties to the Yeonseon Group complicates matters. “This debt will be appropriately settled later.” Will this be a fleeting moment of intense pleasure or the beginning of a resilient and tumultuous relationship?