15-year-old Lee Soo-yeon (Yoon Eun-hye) was isolated at school after being labeled as the "daughter of a murderer". She always walked with her shoulders hunched and her head down. Everything changed until she met Han Jung-woo (Park Yoo-chun) who was willing to be her friend. One rainy day, Jung-woo was kidnapped, and Soo-yeon who went to rescue him was also taken away. The kidnapper, who had a history of drug trafficking and rapism, raped Soo-yeon. In the short time when the kidnapper was not guarding, Jung-woo broke free from the rope, looked at Soo-yeon, and ran away because he was afraid that he would run away. He never saw Soo-yeon again... 14 years later, Jung-woo, who became a detective in the serious crime team, devoted himself to the work of chasing criminals in order to heal that pain. Soo-yeon, who returned from Paris, became Zoe, a fashion designer with unknown pain. In order to escape from Jung-woo's father Han Tae-joon who wanted to kill him, Jiang Hengjun (Yoo Seung-ho) had to hide everywhere and parted with his mother. And meeting Soo-yeon during that time was another happiness in life. Kim Eun-joo (Jang Mi-in-ae) tried hard to become a police officer in order to catch the murderer who killed her father, but failed the exam three times. In addition to her deep longing for her father, she also has a one-sided love for Jung-woo. How will the fates of the four people intersect in the future?