The Defects

Living in hiding after being discarded by their adoptive parents, Ah-hyeon and the children endure brutal training to survive a world that wants them dead. When Tae-shik, who’s been secretly rescuing “refunded” children, receives a new kill order, he risks everything to save one more life.

Ah-hyeon and the children attempt to flee the country as planned but are intercepted by the organization led by the relentless Jung-hyun. When they uncover the horrifying truth behind the "refund" system, they make the fateful decision to take revenge, starting with their first target, So-mi's adoptive parents.

After extracting a crucial clue from So-mi's adoptive father, the children move one step closer to uncovering the truth behind the organization. But what they witness at the organization's illegal adoption shakes them to the core. Meanwhile, Se-hee initiates a secret project with the First Lady.

To root out the horrifying adoption organization, the children target the head of the organization. They undertake a daring infiltration mission into the bunker. There, Ah-hyeon faces a shocking truth.

The children work together to save Ah-Hyun. They decide to rob the donations from the church of Joo-Ahn's adoptive father, Yoon Se-Hoon. Se-hee reveals her ambitious desire to dominate the world by exploiting Kwon Kang-man and Yoon Se-hoon.

Ah-hyeon and the children, now murder suspects, seek help from the only adult they can trust, Detective Choi. Kwon Kang-man, troubled by the unexpected return of his adopted son Seok-su, who was presumed to be dead, decides to take matters into his own hands.

The children narrowly escape the fire, but they suffer a heavy loss. Determined to seek revenge, they rally their strength. Se-hee, meanwhile, unleashes a much more brutal refund project than they could have anticipated.

A chilling camping trip unfolds. Se-hee’s unrestrained cruelty reaches a terrifying peak as she determines to annihilate everyone in her path. Ah-hyeon and the children confront Se-hee in a final battle to stop her once and for all.