美丽的女孩素妍(朴敏英 饰)多年来一直为幽闭恐惧症所困扰,只要待在密闭的空间里,她就会感受到莫大的压抑与恐怖。好在可爱顽皮的小动物抚慰了她脆弱的心灵,如今的素妍在一家宠物店担任动物化妆师,生活平淡而快乐。但是她的生活很快被一场意外所打破,她的一名客人在离开不久后便死在电梯内,素妍只得暂时帮她照料宠物猫小布。也就从这一刻起,她经常能够看到面容阴森、无处不在的短发小女孩。她的精神几近崩溃,而怪事却愈演愈烈,最终连她的好朋友宝姬也无端惨死。 素妍隐约感到迄今所发生的一切恐怖事件,都与神秘的小布有关……So-Yeon suffers from claustrophobia due to a traumatic incident that occurred to her as a child. So-Yeon is still treated for her condition to this day. She works as a groomer at a pet shop. One day, a cat named Bidanyi comes into the store. The next day, the owner of Bidanyi is found dead in an elevator. So-Yeon, by request from police officer Joon-Suk, takes the cat home. Shortly after, So-Yeon starts to see a mysterious young girl. She becomes frightened. Then, So-Yeon's good friend Bo-Hee is found dead. Near Bo-Hee, there is a cat which Bo-Hee recently adopted from an animal shelter. So-Yeon now fears for her own life. So-Yeon and Joon-Suk investigate deeper into the mysterious case. There is a hidden story related to the cats.