La casa Slaughter, 4

A prodigal White Mask named Bait (a mute boy with amputated arms and a tendency to survive suicidal thoughts) is sent to a children's home with a mission more malevolent than imaginable. Although Bait does his best to ignore the children's cruelty toward him, he is left with more questions than answers after the monsters attack. What does a kind and mysterious girl named Nannette have to do with what's happening?