One rainy morning, insurance agent Ku-Ho, who has had a lot to drink, drives up against the young girl Mijo. He takes her home only to find to his surprise that she has not suffered any visible injuries from the accident. The girl appears to suffer from amnesia and she cannot speak. Ku-Hu takes care of Mijo and becomes more and more attracted to her. He discovers that she possesses psychic abilities and over time can communicate with her telepathically. His friends view the developments with skepticism and try to gather information about Mijo. In doing so, they come across startling facts about her family. Meanwhile, Mijo's powers develop to dangerous and uncontrollable heights.