Dr. Alan Feinstone has everything. A beautiful wife, a beautiful house, a dentist, a popular reputation, obsessed with order and cleanliness. However, everything changed. On their wedding anniversary, he discovered that his wife Brooke had sexual intercourse with their dirty billiards player Matt. Feinstone waited for them to finish, retrieved his handgun (. 380 Walther PPK), and then followed Matt in his car. He was taken to the home of Brooke's friend Paula Roberts. He hid the gun behind his back and quickly fabricated a story, inviting Paula to Brooke's surprise party. Then, he sneaked into her backyard and saw Paula inviting Matt in just in time. Paula's dog, a Rowena, came out of the yard and attacked Feinstone. He fired a shot at the dog's head and then drove to work. At his dental clinic, Feinstone's first patient today was young Jody Sanders, who made his first dental appointment there. Feinstone started brushing Jody's teeth. At first everything went smoothly, until he imagined Jody's teeth were brown and decayed. His toothpick slipped and stabbed Jody's gum. Jodi's mother picked up her crying and bleeding child and angrily left. When Feinstone saw his second patient, beauty queen April Reign, detective Gibbs was investigating the death of Paula's dog. He suspected that the perpetrator was a thief who had been robbing houses nearby, even though the criminal had never used a firearm before. When spending time alone with April, Feinstone injected her with nitrous oxide as a sedative so that he could fill a hole in one of her molars. As she gradually lost consciousness, Feinstone imagined that she had become his wife. He began to kiss and caress him; Wife "; She lay on the dental chair and began to suffocate. I started coughing in April, and half of the people woke up from gas. Feinstone suddenly woke up from a trance, quickly buttoned up April's shirt again, and took off her pantyhose. Feinstone hid her pantyhose behind the counter and placed April, who was still coughing, in the arms of her agent Steve Landers. He led them out, claiming that April had dizziness due to nitrous oxide. A few minutes later, Steve came back and punched Feinstone hard. They left angrily and threatened to file a lawsuit upon departure. Feinstone decided to end his day's work early and let his employees and patients go home. Especially disappointed is Sarah, a teenager who is eager to remove braces. Feinstone's friendly office manager Candy told her that she must wait until tomorrow. Later that evening, Brooke met Feinstone on the practice field. He showcased his new Italian opera themed ward. He encouraged Brooke to try the dental chair in the room and clean his teeth. When she did so, Feinstone tied her to a chair with a scarf and injected her with a sedative using nitrous oxide. Against the backdrop of opera music, he began to pull out Brooke's teeth and cut off her tongue. The next morning, Detective Gibbs and his partner Detective Sunshine, who were investigating the burglary case, came to Feinstone's doorstep and asked him some questions. As they spoke, Brooke - still alive but injected with sedatives - lay on a swimming chair, wearing a bikini, distracting Matt's attention in the backyard while Matt cleaned the pool with a spoon. Just as the police were leaving, Matt found a severed tongue in the net. He took off Brooke's hat from her face and reminded her of this discovery. She moaned and reached out to grab him, revealing her broken mouth. Feinstone came out of the house with a kitchen knife and stabbed Matt to death. When Feinstone arrived at his clinic, Sarah and Paula were waiting for him. Feinstone first met Paula, which greatly disappointed Sarah. When Paula's conversation turned to how well Matt had done for her, Feinstone requested the use of a dental drill and began drilling her teeth too aggressively. When her teeth were damaged, his assistant Jessica questioned what he was doing. Feinstone suddenly woke up from his trance and asked Jessica to finish speaking. On the contrary, Jessica whispered to Paula to leave. When Feinstone found out that Paula had already left, he fired Jessica on the spot. She took out April's pantyhose from the previous day and threatened to expose Feinstone. Feinstone snatched the hose from her hand, wrapped it around Jessica's neck, and strangled her to death. At the police station, Detective Sunshine discovered that the bullets pulled from Paula's dog murder scene only matched one gun in the area: Walther PPK owned by Feinstone. He and Detective Gibbs drove to Feinstone's house to further interrogate him. They found Matt's body near the swimming pool. They quickly broke into the house and found Brooke, who was dismembered. He was tied to the bed but still alive. At the same time, US Internal Revenue Service agent Marvin Goldbloom used Vanstone's tax issues as leverage to extort free dental checkups and attempted to extort compensation from doctors. Feinstone is not satisfied with this. He inserted a retraction device into Marvin's mouth and widened his chin. Then, he used a dental drill to cut open Marvin's tongue. Later, Feinstone's other assistant Karen, f