第 1 季 共 16 集
播出时间：2019年5月7日
第 1 集 Episode 1
播出时间：2019年5月7日
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.
第 2 集 Episode 2
播出时间：2019年5月8日
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.
第 3 集 Episode 3
播出时间：2019年5月14日
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.
第 4 集 Episode 4
播出时间：2019年5月15日
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.
第 5 集 Episode 5
播出时间：2019年5月21日
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.
第 6 集 Episode 6
播出时间：2019年5月22日
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.
第 7 集 Episode 7
播出时间：2019年5月28日
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.
第 8 集 Episode 8
播出时间：2019年5月29日
Park Dong-cheol demands to know why Se-yeon interferes with the case; someone claiming to be Lee Mi-do appears out of nowhere.
第 9 集 Episode 9
播出时间：2019年6月4日
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.
第 10 集 Episode 10
播出时间：2019年6月5日
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.
第 11 集 Episode 11
播出时间：2019年6月11日
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.
第 12 集 Episode 12
播出时间：2019年6月12日
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.
第 13 集 Episode 13
播出时间：2019年6月18日
While attempting to help Park Gi-man with a case, Se-yeon and Min discover something strange; Seo Ji-uk gets a visitor.
第 14 集 Episode 14
播出时间：2019年6月19日
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.
第 15 集 Episode 15
播出时间：2019年6月25日
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.
第 16 集 Episode 16
播出时间：2019年6月26日
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.
