Secret Mother

A charity bid begins at Myungmoon's Charity Party. A woman falls into the swimming pool, and blood flows.

Lieutenant Ha runs into Yoon Jin and fails to catch a criminal. Yoon Jin hires a private tutor for Min Joon.

Yoon Jin meets Min Joon's tutor, Eun Young. Yoon Jin still does not trust her entirely and watches her.

Ji Ae learns Min Joon's tutor is her old colleague's sister. Eun Young learns Yoon Jin has two children.

Yoon Jin gets harassed by a man who knows about her daughter's incident. Eun Young comes to rescue her.

Yoon Jin visits a detective agency for Eun Young's contact. Hye Kyung learns Eun Young knows about her affair.

Yoon Jin confronts Eun Young. Eun Young tells her that Min Joon is struggling. Yoon Jin ignores her.

Yoon Jin promises to focus on Min Joon. Jeong Wan finds footage of Eun Young at the mall and calls Yoon Jin.

Yoon Jin fires the new tutor and re-hires Eun Young. The three mothers are panicked at Eun Young's return.

Eun Young rushes to Seisim Medical Center for her sister and finds Hyeon Joo's bed empty. She sees Yoon Jin.

Yoon Jin sees her husband with Eun Young. Yoon Jin doesn't think much of it and trusts Eun Young.

Eun Young finds Hyeon Joo's clover ring in Yoon Jin's drawer and hears Hyeon Joo has tried to kill herself.

Yoon Jin meets Hyun Chul. Jeong Wan tells Yoon Jin that Hyun Chul could possibly be a witness.

Jeong Wan shows a photo of Eun Young to Yoon Jin and asks if she's seen her recently. Hwa Sook sees a lawyer.

Eun Young learns Hyeon Joo and Jae Yeol are exes. Jeong Wan assumes Eun Young tried to remove any evidence.

A security guard hands Eun Young a USB and tells her the person who recently moved out handed it over.

The four mothers are interrogated and confined. Hwa Sook learns Seung Soo is not having an affair with Ji Ae.

Yoon Jin realizes her husband has had an affair. Yoon Jin meets Seon Ja in Eun Young's hospital room.

Jeong Wan interrogates Hyun Chul. Jae Yeol learns Eun Young has run away from the hospital.

Yoon Jin realizes the video Seon Ja showed her was fabricated. Jeong Wan gives Hyun Chul another chance.

Yoon Jin finds all of Min Ji's belongings in the storage room. Eun Young gets kidnapped by a man in all black.

Yoon Jin confronts Seon Ja. Seon Ja denies all accusations, but Yoon Jin does not believe this.

Ye Eun dies. Jeong Wan tells this to Hyun Chul. Hyun Chul tells Yoon Jin not to trust her husband.

Hyun Chul goes missing. Eun Young learns Hyeon Joo and Jae Yeol have known each other for a long time.