A man named Duncan lives with his wife, Sarah, who worries about his constant stress. One day, he schedules an appointment with a gastroenterologist after experiencing a rather serious level of gastric stress the night before. During the appointment, the doctor and nurse spot a large "Polyp (medicine)" in his intestinal tract. After seeing a large amount of stress at a very fast pace from work with his boss placing him in charge of releasing employees to home, where a man his age is in a relationship with his mother and his wife is making him see a very eccentric therapist who keeps asking about his father issues, something unusual happens. The polyp forms into a 2-foot-tall sentient being, and begins killing each person the creature sees as a source of stress with each day. The local news counts the attacks as the result of a local rabid raccoon.