So-yeon is an animal groomer who works in a pet shop. One day, she gets stuck with a Persian cat named Silky when its owner suddenly dies. From then on, So-yeon is constantly haunted by a bob-haired girl with green cat-like eyes who turns her life into turmoil. So-yeon desperately seeks help from the people around her, but no one listens. The presence of the girl and the sound of Silky's cries start to choke her life more and more. Not only that, people around So-yeon get killed one by one. Soon, So-yeon comes face to face with the bob-haired girl at the scene of a horrific death. So-yeon gets rid of Silky hoping her troubles will come to an end, but Silky keeps coming back to her. Terrified she could be the next to die, So-yeon sets out to find out the identity of the girl with the help of her dead friend's ex-boyfriend, Jun-seok, who is a cop. Later, So-yeon finds out the truth to the tragic incident that took place in the past.