Hae-Gwan's (Lee Sung-Min) daughter Yoo-Joo (Chae Soo-Bin) is missing. People around him tell him that his daughter died in the fire that took place at a subway station in Daegu, but Hae-Gwan refuses to believe she is dead. To find Yoo-Joo, he goes everywhere and anywhere. One day, he receives a phone call that the caller saw Yoo-Joo on an island. Hae-Gwan goes to that island, but he can't find her there. At night, Hae-Gwan sits on rocks by the sea. He sees a light fall into the ocean and he is then swept by big waves. Hae-Gwan then finds himself on the beach. He sees something unusual and first believes it is a landmine. It turns out it is actually an AI satellite robot which saves every conversation made on a phone. Hae-Gwan thinks he can find his daughter with the help of the robot. He names the robot Sori ("Voice").
- Other name: 로봇, 소리,Robot; Sori,Robot Sound
- Genre: Drama, Sci-fi
- Status: Completed
- Duration: N/A min
- Country: South Korea
- Network: N/A
Cast: Byeon Jin Soo, Cha Soon Bae, Chae Soo Bin, Chang Tae Min, Han Ji Seong, Han Ji Won, Jeon Hye Jin, Jeon Kook Hwan, Jeong Do Won, Jin Woo Jin, Jo Deok Hyeon, Kang Jin Ah, Kim Ga Eun, Kim Ha Yoo, Kwak Shi Yang, Lee Dong Yong, Lee Ha Nui, Lee Hee Joon, Lee Moo Saeng, Lee Seong Min, Lee Seung Joon, Lee Yeong Jin, Moon Jae Won, Nam Yeon Woo, Park Ji Hoon, Park Yeong Soo, Ryoo Joon Yeol, Shim Eun Kyeong, Yang Kyeong Won