Do you believe that there is a passage to another world in a corner of your house? Don't climb in there. After the little girl Caroline moved into her new house, she was bored by the dilapidated and lifeless environment. The life of boring old-fashioned parents, weird neighbors, a pesky little boy and his little black cat was deadly for her, who was full of fantastic ideas. But things weren't always that bad. One night, behind the 13th door of her house, she found a secret passage. Caroline, who likes excitement and adventure, certainly wouldn't give up the chance to find out. So she crawled slowly down the passageway. Caroline found that on the other side of the channel was a world that was exactly the same but different from reality, where everything now seemed to have been replicated, but her dreams came true here. What pleases Caroline most is that mothers in this world are kind and obedient to themselves. But later, she found out that the "ghost mother" was going to put on her button eyes and keep herself in this "wonderful" world forever. Caroline found herself in a disaster, and she had to find a way to escape from the ghost mother.