Lena teaches Biology and is incapable of accepting the disappearance of Kane, her husband’s soldier. One year after he was declared dead, he suddenly recurs, as if nothing had happened. Lena does not have time to ask too much because she is immediately quarantined in quarantine because Kane is the only survivor of a group of soldiers who have overrun a dangerous area. To learn more, Lena, together with four scientists, decides to find out more about this threatening and fascinating place.