High school student Cho-eun sees the light at the hideout when she was with her friend On. Her stomach starts to swell with an unknown sound, and Cho-eun shows abnormal symptoms. The doctor tells Cho-eun that she is pregnant. Cho-eun sets out to find On, who has disappeared. Cho-eun is chased by a man who tells her that she must go to give birth to God's child at the hideout where On told her to wait. She escapes with Ji-soo's help, but soon Ji-soo takes out a knife and tells him that she must kill the monster in his stomach.