Kim Mingyu, the 28-year-old CEO of the Kim Family Group and youngest son of a notorious former mafia boss, stands at the center of a powerful empire built on wealth, influence, and fear. Known for his commanding presence, protective nature, and need for control, Mingyu faces constant pressure from rival families, business competitors, and threats within his own organization. His most trusted ally is Jeon Wonwoo, a calm and highly skilled bodyguard who also serves as his personal assistant. Loyal, observant, and unwaveringly dependable, Wonwoo handles Mingyu's security and daily affairs while remaining the one person capable of matching his intensity with quiet composure. Together, they navigate a dangerous world of corporate power struggles, family expectations, rival factions, and hidden betrayals, where loyalty is rare and trust can determine who survives. As tensions rise around them, their partnership becomes stronger, blurring the line between professional duty and personal devotion.