It is the story of 35-year-old architect Seung Min as he received a visit at his office someday from a woman who appears to be changing the course of his life. They both start on a new engineering project where they both fall in love together, then Seung-Min hesitates to get a job offer for Seo-Yeon. Now, memories are replayed and sparks fly as they find themselves at different intersections in their lives.
