Days after her friends disappear during a trip to a mysterious cave, a girl is approached by a grown man claiming to be one of her missing pals. Lee Hyo-je, Kim Dan-yool, Dong-won Gang, Hee-won Kim, Sin Eun-soo, Hae-hyo Kwon, Eom Tae-goo, Kim Hee-won, Kwon Hae-hyo, Shin Eun-soo, Gang Dong-won, Moon So-ri Added on Netflix 2021-12-13. Youtube Trailer