Episode 1
Hae-jun discovers a time machine while Yoon-young struggles with her busy job until tragedy strikes.
Episode 2
Yoon-young thinks that it could be a good thing that she somehow ended up in 1987 and met Soon-ae.
Episode 3
Yoon-young joins Soon-ae's class as planned, but a sudden twist drastically disrupts everything.
Episode 4
Hae-jun's expectations are challenged as events unfold, until a student teacher enters the scene.
Episode 5
Yoon-young's choice to withhold the specifics of her reasons for staying might have been an error.
Episode 6
Despite Hae-jun's confidence in his thorough preparations, it turns out they are insufficient.
Episode 7
Hae-jun and Yoon-young find relief, but their narrow focus may lead to unforeseen consequences.
Episode 8
The truth dawns on Hae-jun and Yoon-young that they are bound by certain inescapable factors.
Episode 9
Despite grappling with the grief of her sister's death, Soon-ae's primary concern lies with Hee-sub.
Episode 10
With an awareness of how small details can alter everything, Hae-jun directs his attention to Hae-kyung.
Episode 11
Not all women who read are dangerous, but the ones around Soon-ae might be a little too dangerous.
Episode 12
The complexity of the case deepens as Hae-jun and Yoon-young investigate, causing confusion to mount.
Episode 13
Hae-jun is caught in an unfortunate coincidence, with everything pointing to him as the murderer.
Episode 14
Hae-jun realizes that investigating the case might have affected someone very close to him.
Episode 15
Looking into the eyes of the culprit who stands staring down at Hae-jun leaves him speechless.
Episode 16
Farewells exchanged, Yoon-young and Hae-jun journey to meet them again on the other side of the timeline.
