An international group of film students finds a disturbing video clip on the dark web which seems to contain poltergeist phenomena. Agreed that it's just what they need for their latest documentary project the group travels to the sanatorium shown in the video clip. Once there, they rig up their camera equipment and start to explore the possible ghost activities - until the true horror begins.

In the main character, under mysterious circumstances, the brother dies. The girl begins to pursue realistic nightmares, and she goes to the Institute of Somnology, where she and other patients are immersed in a joint lucid dream. But after dawn, they will wake up in a completely different reality, which is worse than any nightmare ...

二战期间，一群德国士兵被困在一个由妇孺老幼组成的德俄村庄。最开始两队人马战战兢兢维持着和平共处的幻象，而当死亡的扳机扣响，彼此间脆弱的信任瞬间被撕裂，杀戮如同多米诺骨牌一般一路往下，妇孺老幼们开始拿起武器反抗暴行。