River (Kwon Sang-woo) and Da Hai (Soo Ae) first met in a nursery. The same experience made them regard each other as their only one. River is even more for Da Hai, he can do everything in the world. Because Da Hai was adopted, the two met again seven years later. And this time, River, with the belief that he would never leave Da Hai again, worked hard to make Da Hai happy. In order to send Da Hai to study abroad, River gave up his future and worked as a gigolo to earn tuition for Da Hai. However, Da Hai, who was moving forward step by step, gradually deviated from his original intention. She began to feel dissatisfied, and finally even for her own benefit, she did not hesitate to let River bear all the charges. River, who believed in Da Hai unconditionally at the beginning, also gave up on Da Hai after their daughter died accidentally, and a journey of revenge began. Also caught in this vortex of love and desire is Baek Do-hoon (Jung Yun-ho), the son of a large consortium. The love, hatred, and hatred of the three people are quietly staged with helplessness and sadness. This drama is adapted from the comic "The Legend of the Wild King".