E1 - Episode 1

Aired: May 06, 2019

After getting alarming news from his fiancee, Cha Min has a mishap and receives an object called Abyss; Go Se-yeon meets someone who says that he is a friend.

E2 - Episode 2

Aired: May 07, 2019

Min explains what he did to Se-yeon, who is in disbelief over her circumstances; vowing to find her killer, she comes up with a way to help Min and herself.

E3 - Episode 3

Aired: May 13, 2019

Se-yeon and Min are stunned by what Park Gi-man has been doing, and they unwittingly get help from a police detective who thinks that she is someone else.

E4 - Episode 4

Aired: May 14, 2019

Convinced that he has seen his ex-fiancee, Min is frantic to talk to her, but Se-yeon tries to remind him that he is not the same person anymore.

E5 - Episode 5

Aired: May 20, 2019

After making a horrific discovery, Se-yeon considers using Abyss and tries to persuade Park Dong-cheol to keep investigating the murder of the prosecutor.

E6 - Episode 6

Aired: May 21, 2019

Park Dong-cheol tries to hunt down Oh Yeong-cheol, who keeps eluding the police; Min's mother doesn't know what to make of the changes she sees in her son.

E7 - Episode 7

Aired: May 27, 2019

Se-yeon finds herself viewing Min in a different light after realizing he has always been by her side; Jang Hui-jin reveals something surprising to Min.

E8 - Episode 8

Aired: May 28, 2019

Park Dong-cheol demands to know why Se-yeon interferes with the case; someone claiming to be Lee Mi-do appears out of nowhere.

E9 - Episode 9

Aired: June 03, 2019

Se-yeon tries to explain her actions to Min and has an emotional reunion with her mother; Hui-jin refuses to back down upon being confronted by Min's mother.

E10 - Episode 10

Aired: June 04, 2019

Se-yeon gets a feeling that she may be in danger, Min reveals a secret about his father, and Hui-jin's mother becomes agitated after seeing someone on the television.

E11 - Episode 11

Aired: June 10, 2019

After Park Dong-cheol alerts him about Oh Yeong-cheol, Min goes looking for Se-yeon. Lee Mi-do's parents get a perplexing proposal from Min's mother.

E12 - Episode 12

Aired: June 11, 2019

Se-yeon senses something unnerving about Seo Ji-uk; Hui-jin gets an unexpected visitor and has an idea about what Oh Yeong-cheol could be planning to do.

E13 - Episode 13

Aired: June 17, 2019

While attempting to help Park Gi-man with a case, Se-yeon and Min discover something strange; Seo Ji-uk gets a visitor.

E14 - Episode 14

Aired: June 18, 2019

Seo Ji-uk puts his plan in motion. On the way to meet Se-yeon, Min receives a disturbing call from Park Dong-cheol and struggles with a difficult decision.

E15 - Episode 15

Aired: June 24, 2019

Min and Se-yeon set out to acquire evidence against Seo Ji-uk, with Park Dong-cheol's help; Min's mother questions Se-yeon about her intentions.

E16 - Episode 16

Aired: June 25, 2019

After proposing to Min, Se-yeon copes with the consequences of his sacrifice and reveals the truth to her parents; Seo Ji-uk's trial begins.