You finnaly escaped your abusive boyfriend and decided to become a nanny to an English family, when you went there you asked where is the son but they showed you a doll, it seems that they had lost their son in a fire and couldn't accept the loss and made a replication of him as a doll, they gave you strict rules you had to follow, you did as they pleased, but after some time you really started believing that the doll is real.

One day, you saw with a porcelain doll mask standing in a room...Jungkook, he was the so called doll, but no... he's a real, he had lived in the walls of the house so his family wouldn't know about him, but as you had taken care of his doll he had grown fond of you.