The plot revolves around a robotic satellite with artificial intelligence that crash lands in Korea and contains clues for a father who is desperately searching for his missing daughter.
While desperately searching for his missing daughter, Hae-gwan comes across an AI satellite robot that remembers sounds from all over the world. Rejuvenated by the robot's abilities, Hae-gwan begins to track down his daughter's voice through the robot. As they continue their journey, they form an unforgettable bond.