What if you had a lover that used to mean everything to you?

What if you have the ability to go back in time where everything was perfect?

What if you had the chances to restart and fix all thing that went wrong?

For Na Mi, it was possible.

Ever since she was involved in a car accident, she had the ability to go back in time where her life used to be so perfect.

While she went back in time to spend time with her ex boyfriend, she learned what makes them break up.

Na Mi tries her best to fixes the problem and hoping that her present time, he'll will stay by her side.