When a torrential downpour blocks his way home after work, rookie employee Seon U ends up spending the night at the apartment of Team Leader Kang, the boss he has always found intimidating. Seeing the normally cold, perfectionist Team Leader Kang at home without his glasses and completely off guard, Seon U feels an unexpected flutter of attraction. Later, while sharing wine after a shower, Kang's surprisingly teasing and provocative side emerges, pushing Seon U to finally give in to the rebellious feelings he had long kept suppressed. As the two begin a tense and secret office romance, the arrival of Assistant Manager Baek from a client company throws everything into a new phase. Holding the absolute weapon of a business contract between the companies, Baek pushes Team Leader Kang's jealousy and desire for control to their limits. Thus begins a tangled and dangerous story involving three men, where love, rivalry, power, and possessiveness become increasingly intertwined.