Young Brooke Storm plays with her doll in an abandoned shack in a swamp when she hears a motorcycle approach. She hides in the reeds as a teenage couple arrives and enters the dwelling. When the girl refuses to have sex with her date, the angered boy rips the head off of Brooke’s doll. As they drive away, Brooke retaliates by throwing a pail of muddy water into the driver’s face, causing them to crash and become impaled on an iron fence. Eighteen years later, Brooke teaches biology at a high school. When she asks Dickens, one of her unruly students, to collect the students’ exams, he throws the papers in her face, prompting Brooke to slap him. Dickens vows to get even. Later, he witnesses Jon-Jon being harassed by the quarterback for quitting the football team. Dickens comes to his defense, and starts a fight with the quarterback, enlisting his friends, “Queenie” and “Smiler,” to gang up and embarrass the jock. Elsewhere, Coach Heaton asks Brooke to go out with him, but she declines. However, leaving school, Brooke’s colleague, Coach Sandy Hand, convinces her to accept a date with Coach Heaton. Dickens and Jon-Jon follow Brooke home and watch her through a window as she masturbates. She is interrupted by a telephone call from Heaton and accepts his invitation to go to the football game. At the game, Dickens, Smiler, Jon-Jon, and Queenie drive Dickens’ convertible onto the field during a play. Jon-Jon intercepts the ball and they race off the field. They drive to the swamp where Queenie and Jon-Jon separate from the others and kiss. Dickens leaps from the reeds to scare them, and Jon-Jon leaves in anger. Afterwards, Dickens tries to seduce Queenie, but she insults him. Dickens drives the friends to Brooke’s house where he attempts to scare his teacher by pretending to be a ghost from the “legend of the swamp” story that involved the murder of two teenagers. He orders everyone to put on Halloween masks. When Jon-Jon protests, but succumbs to peer pressure and goes along with the prank. They climb onto Brooke’s roof, where they scream and hurl mud from the swamp at her windows. Terrified, Brooke flashes back to the accident she caused, and runs outside in a panic, where the teens await to cover her in slime. She crawls, screaming back inside, and Dickens smashes his hand through a window. When headlights appear, the pranksters run away. Coach Sandy Hand sees the broken glass and runs into the house to find Brooke muttering that the dead teenagers have returned. Sandy washes the mud from her friend, gives her a sedative and puts her to bed. After Sandy leaves, Dickens enters Brooke’s bedroom wearing a mask, causing Brooke to faint from fear. Queenie enters and catches Dickens kissing the unresponsive teacher, and pulls him away. However, when Dickens insults Queenie, the girl begins molesting Brooke. Jon-Jon fights Dickens off, and as they wrestle, Brooke awakens and hurls herself out the window. Believing she is dead, the teenagers flee. Dickens declares that they frame the school quarterback for Brooke’s death, and sends Jon-Jon to get “proof” while the others return to the teacher’s house. Jon-Jon drives to a diner frequented by the football team and steals a jersey from the quarterback’s car before slashing his tires. A teammate sees him drive off and recognizes Dickens’ car. The quarterback jumps on a motorcycle and gives chase, but Jon-Jon forces him off the road. Back at Brooke’s house, Queenie’s pacing annoys Dickens and he orders her to wait outside. She is shocked to discover that Brooke’s body is no longer in the front yard. Hearing her teacher’s cries for help, Queenie goes into the woods, where Brooke beats her to death with a rock. When Jon-Jon arrives, Brooke lures him into the woods and knocks him unconscious. Afterwards, Brooke stabs Smiler in the head with a pencil, and he returns to the living room and dies at Dickens’ feet. Brooke attacks Dickens and pins his shoulder to the wall with a butcher knife, then proceeds to bind him. When Jon-Jon revives, he fights Brooke and unties Dickens, who grabs the knife and attacks Brooke. He becomes impaled on the crowbar she wields, but manages to slice her throat. Jon-Jon tosses the quarterback’s jersey on the bodies and flees. At school, police arrive and arrest the quarterback. Jon-Jon smirks, believing he got away with the crime, but screams as he hallucinates that the substitute teacher is Brooke.