A police officer finds a blood-covered man crawling along the side of the road, and rushes him to the hospital. Soon after he arrives, something starts to transform the patients and staff into monstrous and blood-thirsty creatures. When the survivors venture into the hospital’s mysterious sub-basement, they find that much is amiss.

This movie has some great body horror effects going on, and some impressive gore. It teeters between horror and science fiction, with some Satanic cult action tossed in, and that gets to be a bit much, but it delivers some good scares and cringes.