In 1975, John Baker and his boyfriend, Lenny, take John's children Angela and Peter on a boating trip. After the boat capsizes, John and the children attempt to swim ashore. However they swim into the path of a reckless motorboat and are struck. John and Peter are killed.
8 years later in 1983, Angela is now traumatized. She has been living with her eccentric aunt, Dr. Martha Thomas, and her cousin Ricky Thomas. Angela and Ricky are sent to Camp Arawak. Due to her introverted nature, Angela is bullied, her main tormentors being fellow camper Judy and camp counselor Meg. The head cook, Artie, attempts to molest Angela as well. Later, an unseen figure causes Artie to get severely scalded by the water he is boiling. Artie's incident is deemed accidental by camp owner Mel Costic.
Campers Kenny and Mike also mock Angela, prompting Ricky and his friend Paul to get into a fight with them. Paul befriends Angela. Kenny is later drowned, his death also ruled accidental by Mel. Paul asks Angela to attend a movie with him and kisses her. Campers Billy and Jimmy pick on Angela, and Billy is killed next, stung to death when someone traps him with a beehive. Mel starts thinking there is a killer in the camp.
The relationship between Angela and Paul grows strained when Paul kisses her again, causing Angela to have a flashback to her youth when she and her brother witnessed their father in bed with Lenny. Paul is seduced by Judy, and the two are found kissing by Angela. Guilty, Paul attempts to explain himself but is shooed away by Judy and Meg, who throw Angela into the water. Angela then has sand flung at her by small children. She is comforted by Ricky, who swears revenge on her aggressors. Meg is killed next in the shower.
A camp social is held. At the event, Paul apologizes to Angela again and she tells him to meet her at the water. Mel finds Meg's body. Four of the six children who threw sand at Angela are found hacked to bits. Soon after, Judy is killed by being raped with a lit curling iron. The camp is thrown into a panic with all the deaths. Thinking Ricky is the killer, Mel beats him mercilessly, but is shot in the throat with an arrow.
Police arrive and begin searching for the missing campers. Paul is at the beach with Angela, who suggests they go for a swim. The policeman discovers Ricky, unconscious but alive. Ronnie and Susie find a naked Angela humming and clutching a hunting knife and Paul's severed head. They are shocked to discover that "Angela" is actually Peter, her thought-to-be-dead brother. It is revealed that the real Angela died in the accident and Peter survived. After Martha gained custody of him, she decided to raise Peter as the girl she always wanted, already having a son. It is implied that Peter was mentally affected by seeing his father sharing a homosexual embrace with another man. The film ends with the nude and blood-covered "Angela" (male genitalia in full view), standing before the shocked Susie and Ronnie and letting out an animalistic hissing sound.
What happens to Judy ?
Judy is killed by being raped with a lit curling iron