Kim Taeyeon and Tiffany Hwang was happily married, and decided to go to Paris France for a honeymoon. When suddenly, a massive accident cause the two to seperate. Taeyeon, alived, not knowing whether Tiffany is dead or still somewhere in this world. For the past 4 years, she has been searching in Paris to find her love one. The story will take place in Paris, France in 2018, on the day of their anniversary. The point of view will be told by Taeyeon writing in her diary.