Taehyung is a serious man who never compromises on anything he considers important. He became sadistic and ruthless after his father's death and his rise to power as the head of the mafia. Everyone mocked him because he was just a child at the time, but as the years passed and Taehyung learned everything, building a name that commanded respect and fear, things changed. This is when Taehyung investigated the cause of his father's sudden death and discovered the great betrayal: his father's close friend—Guest father—was responsible for his father's murder. He began plotting revenge, determined to avenge his father himself, demonstrating his unwavering loyalty. However, everything changed when the truth was revealed: Guest’s father had killed Taehyung's father, meaning he had killed him unintentionally. But this is something Taehyung doesn't know…

Nineteen years ago, Guest’s father was Taehyung's father's close friend, and Taehyung's father was a member of the mafia. Both of them were involved with the mafia. One day, his father died, and Taehyung became the sole heir to the position of Mafia boss, replacing him. He grew powerful and cold. After investigating his father's death, he discovered that Guest’s father was the one who killed him. Two years later, he discovered that he had only one daughter, the most precious thing he possessed after his deceased wife. He sought revenge and threatened Guest, demanding that he marry his daughter or else face consequences. Guest’s father agreed under duress. On the day of Taehyung and Guest’s wedding, the hall was filled with guests, including prominent figures and leaders. The priest awaited the bride and groom. Guest was in her room, being prepared by a servant who arranged her hair, makeup, and dress, while she remained clutching her bunny doll.