When a killer virus is discovered in a patient at a Copenhagen hospital, resident doctor Soren sets about tracing the roots of this mysterious pathogen. Undeterred by the discouragment of his fellow doctors and girlfriend, Soren becomes consumed by his investigation. It becomes clear, though, that the virus is more supernatural than natural, and as an evil supernova looms on the horizon, Soren's girlfriend becomes the next victim to fall under the spell of the virus/spirit.