Lee Ho-jae (Director) · Lee Soyoung (Screenplay)
Lee Sung-min
Hae-Gwan
Shim Eun-kyung
Sori (voice)
Lee Hanee
Ji-yeon
Chae Soo-bin
Yoo-joo
Lee Hee-jun
Jin-ho
Kim Won-hae
Goo-cheol
Ryu Jun-yeol
Underground Singer
Jeon Kuk-hwan
President Go
Kwak Si-yang
Hyeon-soo
Jeon Hye-jin
Hyun-sook
Rie Young-zin
Yoo Sung-jin
Kang Jin-ah
Jang Geun-yeong
Nam Yeon-woo
NIS agent
Lee Seung-joon
NIS agent
Yang Kyung-won
NIS agent
Lee Hyun-gul
Police
JJ Graham
U.S. military officer
Yoo Chang-sook
Grandmother
Han Ji-won
Yoo-joo's Friend
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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.
