A couple working in a chemical factory inexplicably die after the birth of their son. Then, the baby appears to cause the death of the pets of his adoptive family. When he is isolated for study, he is shown to be aging and growing rapidly, and to have highly toxic saliva.

Zi Hen, who is being raised in a strict orphanage, is suddenly adopted by the beautiful and wealthy Luo Ban-di, who murdered her own husband.