The drama will tell the story of a man and a woman who share the same fate and meet each other as a top star and a TV drama screenwriter. Born on the same day and at the same time, Philip (Park Shi-hoo) and Eul-soon (Song Ji-hyo) are "shared destiny". Their fate is like the zero-sum law. When one is happy, the other will suffer misfortune. The fate of the two is like a tug-of-war, pulling each other, and many thrilling stories are involved in the process.