The Vietman war is setting for this tight horror thriller about a team of soldiers who are sent on a search and rescue mission after a radio transmission is received from a unit sent in 6 months previously and presumed missing. The mission becomes far more complex when the soldiers find themselves under threat from an unseen and deadly enemy. Though with the odd tacky moment, and some moments of banal behaviour, this movie is full of little suprises and very creepy, with a very taut sense of pschological disintegratrion amongst the men. Another Korean gem, beautifully crafted with a depth and brooding mise en scene sadly lacking from most Hollywood horror.