A mysterious app promises wishes β then starts a countdown to death. As a group of teens becomes entangled, they must break the deadly chain to survive.
Yoo Se-ah
Kim Gun-woo
Im Na-ri
Kang Ha-joon
Choi Hyeong-wook
Bang-wool
Kang Ha-young / Haetsal
Coach Song
Do Hye-ryeong
Kwon Si-won
Han Gi-tae
Detective
Taxi driver
Se-ah's mother
Eob-soon
Yang Hee-jin
Lee Dong-jae