Ryu Ji Hoon And Eun Yeon Ah... We were the best couple. The love of youth… crazy and crazy. But that love… I killed him and ruined my life completely. If I can go back to the past, it would do so much… Not to be tied to you. Avoiding you. 14 years later, in order to change this unfortunate reality of a greater unfortunate situation, Yeonhwa rises to the thirteenth stairway to the past, following a suddenly rising memory. If this is real... If she really jumped into the past, will she be able to avoid making this unfortunate mistake again?! 32 years old Yi Yeon Ah went back to the past, 14 years ago. Can she really break her relationship with her first love and change her terrible past? Climb with us to the STAIRWAY OF TIME...