Dr. Newman (Randy Molnar) runs an asylum where he secretly works on genetic experiments to cure diseases. He uses his patients as guinea pigs and plays with severed heads gotten from the local morgue (delivered by Bill Cobbs, whose instantly recognizable appearance would seem to be an attempt at credibility for the feature). His pregnant wife has a different perspective on his work and urges him to quit. His rather creepy and determined nurse goes behind his back to keep the experiment going. This results in the doctor's wife giving birth to twins. One is normal, the other deformed.
Jump ahead a quarter century, the asylum is abandoned and boarded up and everyone is presumed dead. A group on a field trip for deaf teens they run into a storm and seek shelter in the old asylum building. As you can probably guess, the deformed baby is still there, only grown up and ready to kill. This is where it becomes a bloody game of survival as those in the house e picked off one by one until the inevitable twist.
The characters are all pretty bland and unremarkable. I am pretty sure hey got names, but danged if I cannot recall what they are. I guess it doesn't matter as none really stay for a long time nor have anything much to say.
If somehow they were able to marry the atmosphere of the first half with the blood of the second this would have been more interesting. As it stands the opening stuff about the experiments drags on too long in light of the second half of the movie and the second half feels rushed and seriously lacking in development due to the time taken up by the opening.
I wonder what he were thinking of when they fused these two half movies into the creature that it is. The doctor half showed a lot of potential of giving us a slightly ore the top psychological burn as the wife/nurse rivalry took shape with the doctor caught in the middle, not to mention the criminally underused Michael Berryman as one of the inmates. The monster half was interesting as well, even if it underused the fact that some of the victims were deaf. I did feature some very nicely executed practical ore effects.