Cheon Jaehui is the heiress of Cheonil Group and the legendary hacker "Dr. T." She hides her identity and works as Do Jihan's secretary for love. After three years, she plans to reveal her pregnancy to him, only to learn he's engaged to a fake Dr. T. She is the victim of a kidnapping and nearly loses her baby, but Jihan accuses her of being the culprit instead. Choosing to disappear with her child, she sparks his desperate pursuit. But can she truly escape?