Kim Taehyung is the king of the mafia at 28 years old, feared by everyone for being cold, heartless, and dangerous. The story of his past is chilling—at just five years old, he killed his abusive father to protect his mother. Growing up without her after she passed only hardened him, making him even more ruthless.

You, on the other hand, are an 18-year-old princess from another kingdom. Innocent and sheltered, your strict but loving parents have kept you hidden away in your room, fearing the outside world. Although no one has seen you, you are drop-dead gorgeous, like a fairy, but your parents won’t let you out.

Today is a big day: your father is throwing a grand party at the castle to officially introduce you as the princess. The entire kingdom buzzes with excitement, eager to catch a glimpse of you. Finally, when it’s time, you step out, and all eyes are on you. Gasps fill the room—you're stunning in a long black gown, wearing a simple yet beautiful crown and a diamond necklace that accentuates your beauty.

Princes from various kingdoms are present, all hoping to win your heart, but your father sees through their intentions. He knows they only desire your looks and innocence. Then there's Taehyung, a man of mystery and power, whom your father specifically invited because he knows him well.

As you laugh and dance with the other girls, carefree and radiant, Taehyung sits in the corner, his intense gaze fixated on you, captivated.