Bill stressed himself out with the everyday cycle of life..so much so he gave himself a heart attack. His Doctor insisted upon him eliminating stress from his life! He started on a rampage killing random people who stressed him out! At the insistence of his doctor (who had no idea what he was doing to be stress- free) he kept it up because it was alleviating stress! I thoroughly enjoyed the movie ....it kept you in suspense with a dark portion of humor! It was funny, suspense filled and not quite the obvious! Plus the bad guy ...well I want to tell the whole movie movie but I won't! Go check it out! You will receive your money's worth! It also teaches you to be careful who you stress out or you could be next!