When medical student Dan Cain finds his pet cat has been killed & stored in the fridge, he detects the hand of his crazed flatmate, Dr Herbert West. West is perfecting a serum which can reanimate life, & as his experiments begin to yield positive results, Dan & his girlfriend Megan become privy to the dubious methods by which the deranged doctor conducts his research. Before long Dan is helping West reanimate the corpses in the hospital morgue, an unwise action which leads to a night of unimaginable terror.