Betrayed by the two people she trusted most-her sister and her fiancé-Hyerin walks away from her shattered engagement and leaves France behind. Seeking peace and a fresh start, she returns to Korea, determined to rebuild her life without looking back. But fate places her directly in the path of Kim Taehyung, a man known as the billionaire's billionaire-cold in reputation, brilliant in mind, and unreachable to everyone... until her. When Hyerin unexpectedly becomes his personal secretary, their worlds slowly begin to intertwine. What starts as professionalism turns into comfort, understanding, and a gentle warmth neither of them expected. As they heal each other's wounds, their slow-burn connection blossoms into a love strong enough to rewrite destiny.