After a terrible boating accident, Angela Baker is sent to Camp Arawak, where a series of bizarre and violent "accidents" begin to claim the lives of various campers.

Angela Baker escapes from a mental hospital and surfaces at a summer camp as a counselor who lectures her teenage charges on proper moral behavior. Those teens who break her strict rules -- from the camp chatterbox or a sex-obsessed girl to the boys who are peeping Toms -- are murdered by the impostor in various gruesome ways. As more campers go missing, intrepid counselor Molly begins to piece together the truth.

Psychotic Angela is itching to do what she does best: slaughter dozens of teenage campers. As luck would have it, the previous site of her murders has been renamed and converted into an experimental summer camp meant to bring together privileged and lower-class teens. On the day the youths are boarding the buses to camp, Angela runs over a potential camper with a garbage truck and assumes her identity. Once she has infiltrated the camp, the real terror begins.

It's summer camp as usual at Camp Manabe where the kids torment each other for fun while the underpaid camp staff provides as little supervision as possible. Greedy camp owner Frank and junior partner Ronnie do their best to keep everyone in line, but something sinister is about to put a slash in the roster. When campers and staff mysteriously begin disappearing and turning into gruesome corpses, paranoid Ronnie can't shake the memory of a series of grisly murders that took place at Camp Arawak. As the paranoia worsens, Ronnie's list of possible killers starts growing just like the body count. Only one thing is for certain, something is carving a bloody new trail at Sleepaway Camp where kids can be so mean and surviving this summer is gonna be a real killer!

Allison Kramer suffers recurring nightmares and selective amnesia, returning to camp to discover the truth as the secrets of infamous killer Angela Baker are revealed. [Production for this sequel to 'Sleepaway Camp III' (1989) was shut down after Double Helix Films went bankrupt in 1992, though the film was officially completed using archive footage and released on-demand beginning in 2012.]