Hee Joo (Shin Eun Kyung)'s father died under the knife of the serial killer Ki Bum (Kim Seong Woo). This cruel scene was seen by Hee Joo, who was only seven years old at the time. Although many years have passed in a blink of an eye, the scenes at that time and the murderer's vicious appearance still appear in front of Hee Joo from time to time. Although Ki Bum was eventually punished by the law and imprisoned, this was not enough to dispel the hatred entrenched in Hee Joo's heart. Fifteen years later, Ki Bum's sentence was completed and he was free, and Hee Joo grew up and began her revenge plan. She was determined to kill her enemy to avenge her father. However, Ki Bum is evil and cunning by nature, and Hee Joo, who lacks experience, is likely to fail in revenge and become his wronged soul. Over the years, detective Dae Young (Yoon Je Moon) has been taking care of the helpless Hee Joo. Now, a serial murder case similar to that of the year has occurred again, and he has also launched a pursuit of the murderer.