With record-breaking heat come frayed nerves and a rising crime rate. New York City detectives Rasche and Shaefer are assigned to look into the most brutal murders they've ever seen -flaved bodies hung like curing meat on a rack and they can't believe that just an over-heated temper tantrum is the cause.

When Shaefer has a close encounter with one of the murderers, he realises he's run into something much bigger than the police suspect. The creature leaves him with an alien device implanted in his neck and a strong feeling that this fight is a personal thing.