Korean war drama, set in 1972 during the Vietnam conflict. Six months ago, a unit of South Korean troops on a scouting mission went missing, presumed dead. Then, on R-Point, a strategically important island south of Ho Chi Minh City, a radio transmission is received apparently sent by the missing soldiers. Tough lieutenant Tae-in Choi (Woo-seong Kam) takes a team of nine soldiers on a search and rescue mission to R-Point, but what the unit uncovers is more terrifying than they could possibly imagine.