Surrounded by a forest and a gated entrance, the Grace Field House is inhabited by orphans happily living together as one big family, looked after by their "Mama," Isabella. Although they are required to take tests daily, the children are free to spend their time as they see fit, usually playing outside, as long as they do not venture too far from the orphanage — a rule they are expected to follow no matter what. However, all good times must come to an end, as every few months, a child is adopted and sent to live with their new family... never to be heard from again. However, the three oldest siblings have their suspicions about what is actually happening at the orphanage, and they are about to discover the cruel fate that awaits the children living at Grace Field, including the twisted nature of their beloved Mama.
Emma and the children have finally escaped the House and now head to the place indicated on the pen Norman gave them. But on their way, a large, wild demon attacks the group…
The children’s saviors turn out to be demons named Mujika and Sonju. The pair claims that their religion forbids them from eating humans. Emma and Ray visit Sonju while the others are sleeping in order to find out what happened to humans thirty years ago.
Emma and the group learn the necessary skills to survive in this world from Mujika and Sonju. Back on their own, the children traverse a wasteland in search of a place called “B06-32.”
Without warning, the shelter’s phone begins to ring, echoing through the halls. Emma hesitantly answers and finds that it is William Minerva. Meanwhile, in an underground room at the farm headquarters, a deal is made…
Emma and the other escapees manage to survive the attack on the shelter. Now they have settled in an abandoned temple a short ways from a demon town. Unlike the shelter and Grace Field House, here there is a limited supply of food, and they are barely surviving.
Norman, thought to have been shipped, stands before Emma and Ray. It is a reunion they never dreamed of, and they embrace tearfully. Norman reveals his plan to create the future Emma wants, where the children can live happily.
Though Emma pleads with him, explaining she has no wish to eradicate the demons, Norman is set in his decision and deaf to her arguments. To resolve their dispute, Emma proposes a deal.
Norman, seized by a terrible fit of coughing, spits up blood. He lied about not being experimented on when he was at Lambda. With the little time he has left, Norman manages to reunite with Emma and hopes to create a world where she and the children can live in peace.
Norman has begun executing his plan without waiting for Emma. When Emma, Ray, and Sonju appear, Norman is hesitating to kill Vylk and his grandchild, but he tells them that they are too late and that the plan is already in motion.
Vincent reveals his plan to enter the farm. After hearing this plan, Peter reconfigures the security on the farm to prepare for the intruders. Meanwhile, the shipment of children from the house has been set in motion, and Phil has already arrived at the gate.
As Emma extends her hand to Peter and says, "Let's be free," he shows a calm expression, but realizes his true fate. The children finally arrive at the gate leading to the human world, where they hope to pass through.