Abyss - Season 1

After getting alarming news from his fiancee, Cha Min has a mishap and receives an object called Abyss. Go Se Yun meets someone who says he's a friend.

Min explains what he did to Se Yun, who's in disbelief over her circumstances. Vowing to find her killer, she devises a way to help Min and herself.

Se Yun and Min are stunned by what Park Gi Man has been doing, and they unwittingly get help from a police detective -- who thinks she's someone else.

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

After making a horrific discovery, Se Yun considers using Abyss, and tries to persuade Park Dong Chul to keep investigating the prosecutor's murder.

Park Dong Chul tries to hunt down Oh Young Chul, who keeps eluding the police. Min's mother doesn't know what to make of the changes in her son.

Se Yun finds herself seeing Min in a different light after realizing he's always been by her side. Jang Hee Jin reveals something shocking to Min.

Park Dong Chul demands to know why Se Yun keeps interfering with the case, and someone claiming to be Lee Mi Do suddenly appears out of nowhere.

Se Yun tries to explain her actions to Min and has an emotional reunion with her mother. Hee Jin refuses to back down when confronted by Min's mother.

Se Yun senses that she may be in danger. Min shares a secret about his father. Hee Jin's mother gets agitated after seeing someone on TV,

After Park Dong Chul alerts him about Oh Young Chul, Min goes looking for Se Yun. Lee Mi Do's parents get a perplexing proposal from Min's mother.

Se Yun senses something unnerving about Seo Ji Wook. Hee Jin gets an unexpected visitor and has an idea about what Oh Young Chul may be planning to do.

While trying to help Park Gi Man with the hit-and-run case, Se Yun and Min uncover something odd. Seo Ji Wook is visited by someone from his past.

Seo Ji Wook implements his plan. On his way to meet Se Yun, Min receives a disturbing call from Park Dong Chul and grapples with a difficult decision.

Min and Se Yun set out to obtain evidence against Seo Ji Wook with Park Dong Chul's help. Min's mother questions Se Yun about her intentions.

After proposing to Min, Se Yun copes with the consequences of his sacrifice and reveals the truth to her parents. Seo Ji Wook's trial gets underway.