An enthralling journey begins as a man and woman, trapped in May 1987, embark on their adventure.
Hae jun discovers a time machine while Yoon Young struggles with her busy job until tragedy strikes.
Yoon Young thinks that it could be a good thing that she somehow ended up in 1987 and met Soon Ae.
Yoon Young joins Soon Ae's class as planned, but a sudden twist drastically disrupts everything.
Hae Jun's expectations are challenged as events unfold, until a student teacher enter the scene.
Yoon Young' s choice to withold the specifics of her reasons for staying might have been an error.
Despite Hae Jun's confidence in his thorough preparations, it turns out they are insufficient.
Hae Jun & Yoon Young find relief buth their narrow focus may lead to unforseen consequences.
The truth dawns on Hae Jun and Yoon Young that they are bound by certain inescapable factors.
Despite grappling with the grief of her sister's death, Soon Ae's primary concern lies with Hee Sub.
With an awareness of how small details can alter everything, Hae Jun directs his attention to Hae Kyung.
Not all women who read are dangerous, but the ones around Soon Ae might be.
The complexity of the case deepens, causing Hae Jun and Yoon Young 's confusion to mount.
Hae Jun is caught in an unfortunate coincidence, with everything pointing to him as the murderer.
Hae Jun realizes that investigating the case might have affected someone very close to him.
Looking into the eyes of the culprit who stands staring down at Hae Jun leaves him speechless.
Farewells exchanged, Yoon Young and Hae Jun journey to meet them again on the other side of the timeline.
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