Choi Dayoung has lost her memory but with time and help from her family and close friends she was able to slowly regain it. However there is still a large gaping hole in her memory and no matter how hard she tries she can not find the missing piece.  Prompted by her recurring dream of a mysterious blonde hair boy, whose face is blurred, and coupled with the poignant feelings that always overcomes her every time she walks past the park, she begins to embark on an emotional and physical journey in finding that very last piece. 
However, is it best to have that piece lost forever or will that last piece be worth the pain and displacement she will endure?