A serial killer on the loose. An old salesman is desperate for a sale. Are these gruesome murders done by a human being or is there a monster behind such barbaric, brutal killings?
As the story progresses we understand that one of the characters could be a monster but it could be the other one.
Normal people turn into monsters when they assume there is a threat to their lives. They become monsters to prolong their lives.
Not everyone is looking to prolong their lives but there are some who look to finish it but are unfortunate ones who want to get done with it but are stuck.