The Defects () is a 2025 South Korean television series and starring Yum Jung-ah, Won Jin-a, Choi Young-joon, and Kim Jin-young. It aired on ENA from July 21, to August 12, 2025, and subsequently streaming on Genie TV every Monday and Tuesday at 22:00 (KST).

Synopsis The Defects is an action thriller depicting the desperate survival and revenge of children who barely survived on the brink of death after being abandoned by their adoptive parents.

Cast Main Yum Jung-ah as Kim Se-hee CEO of SH Medical Foundation and President of the Illegal Adoption Organization. Won Jin-ah as Kim Ah-hyeon Leader and spiritual leader of Child Survivors. Choi Young-joon as Woo Tae-sik A worker who disposes of abandoned adopted children. He later becomes their savior. Kim Jin-young as Jung-hyeon A member of the organization, and a loyal subordinate of President Kim.

Supporting Lee Na-eun as So-mi She is one of the children abandoned by her adoptive parents. Despite her painful past, she lives with enthusiasm alongside other children, including Ah-hyeon. Oh Seung-jun as Seok-soo One of the surviving children, he is Ah-hyeon's loyal supporter. Ahn Ji-ho as Joo-an One of the surviving children.

Others Song Young-kyu as Yoon Se-hoon as Kim Ah-hyun With her stunning looks and brilliant intelligence, everything about her resembles Se-hee. as Kwon Kang-man Seok-soo's father. A prominent candidate for the next presidential election and leader of the ruling party. He has strong support from Se-hee.

Production The series is written by An So-jung. It is directed by , whose work includes SF8 (2020), and How to Be Thirty (2022), and produced by and .

Viewership

+ Average TV viewership ratings Original broadcast date Average audience share (Nielsen Korea)Nielsen Korea ratings:

Nationwide Seoul 1 July 21, 2025 2 July 22, 2025 2.063% 2.036% 3 July 28, 2025 4 July 29, 2025 2.199% 2.310% 5 August 4, 2025 2.094% 2.128% 6 August 5, 2025 2.175% 1.975% 7 August 11, 2025 2.028% 1.815% 8 August 12, 2025 2.312% 2.255% Average In the table above, the represent the lowest ratings and the represent the highest ratings. This drama aired on a cable channel/pay TV which normally has a relatively smaller audience compared to free-to-air TV/public broadcasters (KBS, SBS, MBC, and EBS).

References

External links