A grieving woman magically travels through time to 1998, where she meets a man with an uncanny resemblance to her late love.
Han Joon Hee continues to grieve Goo Yun Joon. When she receives mysterious flowers on her birthday, she has an odd feeling that her late lover may be nearby.
While investigating her lookalike, Joon Hee receives a strange package. Kwon Min Joo develops a friendship with her crush but soon faces a huge letdown.
Joon Hee tries to make sense of Min Joo's recollections that get jumbled up with her own. Nam Si Hoon discovers a new side to Min Joo.
As Joon Hee struggles to distinguish reality from her dreams, she receives an old diary that contains a shocking truth.
Back in 1998, Joon Hee's bubbly personality shines through Min Joo. Those around her begin to notice — including a mysterious figure who watches from afar.
Si Hun finds himself attracted to the new Min Joo. The love triangle grows when he decides to come clean to Jung In gyu.
Joon Hee tries to warn the boys of the approaching danger. Meanwhile, a horrifying event takes place at school during the night.
Yun Joon eventually finds his way to Joon Hee. He does whatever he can to enchant her, but falling in love is not as easy as it seems.
Joon Hee and Yun Joon enjoy a stretch of happiness. Meanwhile, Si Hun deals with one obstacle after another.
Joon Hee vows to change the past and save Min Joo. Si Hoonn, while investigating the murder, stumbles upon a chilling truth.
Min Joo turns a blind eye to the dangers ahead and focuses on spending time with Si Hun. Si Hun and In Gyu, however, start to grow suspicious.
As Min Joo takes her life into her own hands, Joon Hee makes a last-ditch effort. She and Si Hun later decide to finally make things right.
