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.

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.

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.