Choi Beomgyu, the charming prince of Daegu, has always lived a life where he could have whatever he desired. Yet, when he meets his new bodyguard, his world is turned upside down. She becomes more than just a bodyguard, she's a forbidden temptation he can't ignore. Even though the idea of having her seems impossible, he refuses to give up. Kang Hana, the most skilled fighter within SecurityArc, is introduced to Choi Beomgyu as her latest client. Her past has remained a tightly sealed vault, never to be opened by anyone. However, when Beomgyu enters her life, he unlocks something within her, stirring emotions and memories she thought were long buried. As their worlds collide, secrets unravel, and the lines between duty and desire blur.