In "Angry Mom," Kim Yoo Jung was angry at the death of Yoon Yae Joo.
On the 4th episode of MBC Wednesday/Thursday miniseries "Angry Mom" broadcast on Mar. 26th, Oh Ah Ran (played by Kim Yoo Jung) pointed to Do Jung Woo (played by Kim Tae Hoon) as the suspect underlying the murder of Jin Yi Kyung (played by Yoon Yae Joo).
On this day, Do Jung Woo (played by Kim Tae Hoon) was the subject of an anonymous report. Jin Yi Kyung had called the Department of Education and said that in the past, Do Jung Woo (played by Kim Tae Hoon) had been part of a relationship affected by statutory rape. In the end, Jin Yi Kyung suffered a mysterious death from a fall. This was reported to be a suicide.
Afterwards, Oh Ah Ran heard about the death of Jin Yi Kyung. Oh Ah Ran ran to the funeral and pointed to Do Jung Woo to be the murder suspect. Oh Ah Ran said, "You killed them, right? You killed our Yi Kyung," With this, he was in pain.
Meanwhile, "Angry Mom" features issues of education, violence in schools, as well as a passionate young mother who seeks justice for her daughter.