Yu-Hsuan lost her boyfriend Chuan-Sheng in plane accident. She then discovered Chuan-Sheng and a girl look alike Yu-Hsuan both appeared in a photo taken in 1998. Accidentally, she had backed to 1998 and met a boy looked alike Chuan-Sheng.
An unlikely romance forms when a strictly organized career woman hoping to find her true love meets a successful lawyer, whose work litigating divorces has turned him into a marriage skeptic.
Huang Yu-xuan lost her boyfriend from a plane incident two years ago. She misses him a lot and sends messages with no reply. Meanwhile, her colleague claims there is an app that can find someone who looks identical to you.
Huang Yu-Xuan is shocked to find out that her boyfriend was planning to propose to her. Meanwhile, through Ah-Tuo's app, she finds a photo that has a woman who looks exactly like her and her boyfriend is beside the woman.
Going to the past year, 17-year-old Chen Yun-Ru meets her school friends Li Zi-Wei and Mo Jun-Jie. Back to the present, Huang Yu-Xuan is disappointed to find out that the man in the photo is not her boyfriend.
In 1998, Chen Yun-Ru is unconscious in the hospital after a stranger's attack. Meanwhile, in the present, Huang Yu-Xuan falls asleep listening to an old tape and wakes up, becoming Chen Yun-Ru.
Huang Yu-Xuan finds herself back in 2019, and although she goes to a mental hospital, the doctor does not believe her. Meanwhile, she receives Chen Yun-Ru's diary from the 32 Cafe's owner.
Huang Yu-Xuan prepares to go to Shanghai, but first she decides to go to the past once again; she finds out that Li Zi-Wei and Wang Quan-Sheng are different people, and she becomes confused that they look the same.
Mo Jun-Jie is accused of being the suspect in the attack of Chen Yun-Ru, but they go to the police to prove he is innocent; Chen Yun-Ru goes to her uncle to tell him she is Huang Yu-Xuan, but he does not believe her.
Li Zi-Wei encounters a lost girl, and he escorts her home safely; she tells him her name is Huang Yu-Xuan and to never forget her; Li Zi-Wei finds himself falling in love with Chen Yun-Ru.
Mo Jun-jie feels angry to hear Li Zi-Wei's affection toward Chen Yun-Ru, and that he will move to Canada after he graduates. Chen Yun-Ru tells her friends she is actually Huang Yu-Xuan from 2019, but nobody believes her.
A murder case arises at school, and Chen Yun-Ru instinctively feels relevant to the case. Meanwhile, Li Zi-Wei wakes up as Wang Quan-Sheng of 2010 after a car accident in 2003.
Li Zi-Wei wakes up in Wang Quan-Sheng's body in the future. Wang Quan-Sheng studies hard to go to the same university as Huang Yu-Xuan, but soon he is disappointed to find her with another man.
Cai Huan Zhen and Hao Sheng Nan are former classmates whose high school friendship blew up long ago. Now, they're rival travel agents, and they've each fallen for each other's brother. Things between these two families are getting messy.
Sheng Nan is taking matters into her own hands, pulling out all the stops to try to derail Huan Zhen's marriage. Meanwhile, Hao Meng gets involved after an incident strikes up his own displeasures for Cai Huan Zhen.
To take away everything her enemy wants and loves, Cai Huan Zhen becomes a new tour manager in Hao Sheng Nan's company and begins dating her "boyfriend", Hao Meng.
