Young Park Sooyoung and Song Kang meet each other a lot of times coincidentally. Their unexpected multiple encounters bloomed into something different. But something changed their whole life. They unconsciously created a heavy sin that they regret. Years later, they meet again and debut together in the same drama as their first project as Actor and Actress. Is it still a coincidence? The relationship that withered years ago slowly came back to life again as they 'coincidentally' meet a lot of times again being in the same field. Will they get to keep it blooming? Or will it withered... and die?