Bong Woo-Ri (Kim Sae-Ron/Hwang Jung-Eum) was a bright 9-year-old girl, but she didn't have a name or a father. Her mother was also deaf. Nevertheless, there were good people around her like Bong Young-Gyu (Jung Bo-Suk) - a man who loved her mother and was also mentally deficient. The Young-Gyu lived with his elderly mother and his son Bong Ma-Roo (later played by Nam Gung-Min).  Bong Ma-Roo was an honor student who was insecure about his foul-mouthed grandmother and his mentally deficient father. To make matters worse, his father married a woman who was deaf. Meanwhile, 9-year-old Bong Woo-Ri was elated that she finally had a family and a name. Tragedy soon struck when a fire occurred in a factory where their deaf mother worked. Their mother died in the fire and their father was taken into police custody because of a frame-up . Ma-Roo left his sister and said he would come back. Now, Bong Woo-Ri, her grandmother and father awaited his return.  Meanwhile, Dong-Joo (Kang Chan-Hee/Kim Jae-Won) lived with his grandfather, mother and stepfather. His grandfather owned the company "Yoo-Kyung," but the company was run by the step-father due to the grandfather's bad health. By chance, Dong-Joo met Woo-Ri. He promised to teach her how to play the piano. To keep his promise, Dong-Joo attempted to sneak out at night once. During this time, he saw his step-father allow his grandfather to die. An accident then occurred that resulted in Dong-Joo permanently losing his hearing. At the funeral for his grandfather, Dong-Joo's mother learned that her husband cheated on her and even fathered another child. Dong-Joo's mother also learned that the other child was Bong Ma-Roo. The mother then hid Dong-Joo's loss of hearing and took him to live overseas. For revenge, Dong-Joo's mother also took Bong Ma-Roo with them. While living overseas, Bong Ma-Roo changed his name to Jang Joon-Ha. Dong-Joo also learned how to read lips and, because of this, could act as someone with normal hearing. EWatch drama online for free.