Caroline is a little girl who is only a teenager. Just like other children at this age, Caroline is full of childlike curiosity about everything around her. For various reasons, her parents decided to move the family to another town to live in. Moving is a tedious and tiring job for adults, but it is a very interesting experience for Caroline. Similarly, this new town is quite gloomy and weird for adults, but all this is so interesting in Caroline’s eyes, whether it is a grandfather who has trained a rat circus or all day long. The weird sisters who quarreled became the objects of her exploration. But the most amazing thing is not this, Caroline discovered that there is a big secret in this old house! She had counted the doors of the house before, but the number stayed at 13 which is the most unlucky number. But the magic is that there is a door in the living room that no one has noticed. Where does this door lead to? Caroline is definitely an activist, so she walked through this door.
It turns out that behind this door is a "mirror world" exactly like the real world. Although this world is a bit weird, it is very interesting, and more importantly, there is actually a "mother" here. This "mother" is also very kind to Caroline, except that she has a pair of button eyes. Of course, this kind-looking mother is not really good. Not only did she kidnap Caroline's real parents, she tried to sew Caroline's eyes to keep her in this world forever. But Caroline was caught without restraint, and a battle between humans and demons was about to begin again.
