The Defects

Top Cast

Yum Jung-ah as Kim Se-hee
Won Jin-ah as Kim Ah-hyun
Choi Young-jun as Wu Tae-sik
Dex as Jeong-hyun
Ahn Ji-ho as Ju-ahn
Lee Na-eun as So-mi
Oh Seung-jun as Seok-su
Kang Ji-yong as Si-woo
Son Jong-hak as Kwon Kang-man
Song Young-gyu as Yoon Se-hoon

Seasons

Season 1 (2025)

No overview available for this season.

Episodes:

Ep. 1: Eye Shopping (2025-07-21)

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.
Ep. 2: Quality Dissatisfaction (2025-07-22)

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.
Ep. 3: Survivors (2025-07-28)

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.
Ep. 4: Mom (2025-07-29)

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.
Ep. 5: Useful Child (2025-08-04)

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.
Ep. 6: Real Name (2025-08-05)

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.
Ep. 7: D-Day (2025-08-11)

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.
Ep. 8: Final Refund (2025-08-12)

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.