One day, the only heir of a wealthy family was murdered in his office. The victim was Ki Seungho, the president of DA Entertainment. And the suspect was his secretary, Lee Yeonwoo. The world didn't believe in her innocence, and Yeonwoo was ultimately sentenced to death. “If only I had one more chance.” Perhaps her desperate wish just before her death had been heard. When Yeonwoo opened her eyes again, it was a month before the incident took place. As if to warn her of the fate to come, a chilling red line remained on her neck, like a tattoo. So Yeonwoo made a decision. This time, she would save the president and save herself. But this time, Seungho began to pay attention to her.