While desperately searching for his missing daughter, Hae-kwan comes across an AI satellite robot that remembers sounds from all over the world. Rejuvenated by the robot's abilities, Hae-kwan begins to track down his daughter's voice. As they continue their journey, they form an unforgettable bond.

Top Cast

Lee Sung-minHae-Gwan

Shim Eun-kyungSori (voice)

Lee HaneeJi-yeon

Chae Soo-binYoo-joo

Lee Hee-junJin-ho

Kim Won-haeGoo-cheol

Ryu Jun-yeolUnderground Singer

Jeon Kuk-hwanPresident Go