Action & Adventure Drama
S01E04 • 8/10 • 55m • 29 Jul 2025 • KR •

The Defects (2025) S01E04 – Mom

To put an end to the inhuman adoption and refund system, Ah-hyun and the kids set out on a daring mission to confront the head of the evil organization. With fierce determination and a carefully crafted plan, they infiltrate the organization's bunker to strike from within. But once inside, Ah-hyun uncovers a devastating truth behind the system.

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Cast

Yum Jung-ah
Yum Jung-ah
Kim Se-hee
Won Jin-ah
Won Jin-ah
Kim Ah-hyun
Choi Young-jun
Choi Young-jun
Wu Tae-sik
Dex
Dex
Jeong-hyun
Ahn Ji-ho
Ahn Ji-ho
Ju-ahn
Lee Na-eun
Lee Na-eun
So-mi
Oh Seung-jun
Oh Seung-jun
Seok-su
Kang Ji-yong
Kang Ji-yong
Si-woo
Son Jong-hak
Son Jong-hak
Kwon Kang-man
Song Young-gyu
Song Young-gyu
Yoon Se-hoon
Kim Soo-ro
Kim Soo-ro
Shin Yeon-woo
Shin Yeon-woo
Kim A Hyeon [Young]
Ban Hye-young
Ban Hye-young
Client (eps 6)

Episodes

The Defects (2025) S01E01 – Eye Shopping S01E01 57m
21 Jul 25
The Defects (2025) S01E01 – Eye Shopping
Ahyeon and the children, who live as if they were dead after being abandoned, repeat harsh training to protect themselves. Taesik, who has been rescuing children without the organization knowing, makes a decision to save the new 'recall' target.
The Defects (2025) S01E02 – Quality Dissatisfaction S01E02 55m
22 Jul 25
The Defects (2025) S01E02 – Quality Dissatisfaction
Ah-hyun and the kids try to run away as Tae-sik has planned for them. However, Jung-hyun, who had been keeping an eye on them, picks up their trail, putting them in danger. As the truth behind the brutal "refund" system comes to light, the kids vow to take revenge on the adults. Their first target is So-mi's adoptive parents.
The Defects (2025) S01E03 – Survivors S01E03 55m
28 Jul 25
The Defects (2025) S01E03 – Survivors
After being disowned by their adoptive parents, Ah-hyun and the kids live as if they are dead. They endure brutal training, determined to protect themselves. Meanwhile, Tae-sik, who has been secretly rescuing children from the malicious organization, makes a bold decision to save a new "refund" target.
The Defects (2025) S01E04 – Mom S01E04 55m
29 Jul 25
The Defects (2025) S01E04 – Mom
To put an end to the inhuman adoption and refund system, Ah-hyun and the kids set out on a daring mission to confront the head of the evil organization. With fierce determination and a carefully crafted plan, they infiltrate the organization's bunker to strike from within. But once inside, Ah-hyun uncovers a devastating truth behind the system.
The Defects (2025) S01E05 – Useful Child S01E05 53m
4 Aug 25
The Defects (2025) S01E05 – Useful Child
The kids risk their lives to save their guardian, Ah-hyun. To do so, they're in desperate need big money, forcing them to confront Ju-an's adoptive father. Their plan is to steal offerings from his church. Meanwhile, Se-hee's ambition to seize even greater power pushes her toward devastating choices that could change the world.
The Defects (2025) S01E06 – Real Name S01E06 46m
5 Aug 25
The Defects (2025) S01E06 – Real Name
Framed for murder, Ah-hyun and the kids turn to the only adult they trust, Detective Choi. Meanwhile, the unexpected and unwanted return of of Seok-su, the adoptive son who was believed to be dead, throws Kwon Kang-man into a crisis, leading him to seek ways to put an end to the adoption on his own.
The Defects (2025) S01E07 – D-Day S01E07 47m
11 Aug 25
The Defects (2025) S01E07 – D-Day
The kids barely make it out alive from the fire, but with a tragic loss. Fueled by grief and rage, they vow revenge against the monster once more. Meanwhile, Kim Se-hee sets her sights on a refund project that is far more massive, ruthless, and shocking than Ah-hyun and the kids could have ever imagined.
The Defects (2025) S01E08 – Final Refund S01E08 48m
12 Aug 25
The Defects (2025) S01E08 – Final Refund
What begins as a camping trip soon turns into a living nightmare. Kim Se-hee's inhumanity reaches its peak as she executes her plan to massacre the "defects." To stop her once and for all, Ah-hyun and the kids rise up against her and her team, risking their lives for all the lives to avenge the ones already lost and protect those who could be next.

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