Abyss - Season 1
1 - Episode 1
Air Date: May 6, 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.
2 - Episode 2
Air Date: May 7, 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.
3 - Episode 3
Air Date: 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.
4 - Episode 4
Air Date: 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.
5 - Episode 5
Air Date: 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.
6 - Episode 6
Air Date: 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.
7 - Episode 7
Air Date: 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.
8 - Episode 8
Air Date: 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.
9 - Episode 9
Air Date: June 3, 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.
10 - Episode 10
Air Date: June 4, 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.
11 - Episode 11
Air Date: 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.
12 - Episode 12
Air Date: 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.
13 - Episode 13
Air Date: 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.
14 - Episode 14
Air Date: 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.
15 - Episode 15
Air Date: 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.
16 - Episode 16
Air Date: 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.