Olivia McKenna is unable to sleep, and envisions an attack on a young female hitchhiker. The next morning, police and coroners gather outside an apartment building where Russian psychic Karl Raymarseivich, known as “Raymar,” is found dead, along with six young women. Investigators are puzzled to find household items embedded in the walls, and terrified as a bolt of blue lightning issuing from Raymar’s hand punctures the ceiling. At a high school, Carol Mason, Leslie Winslow, and Kitty, who comprise an exclusive club called the “Sisters,” discuss plans for the initiation of new recruit Julie Wells. Unknown to Julie, Carol is using the initiation as a means to humiliate Julie, who is romantically involved with Carol’s ex-boyfriend, Steve. Raymar’s funeral service is held inside a mausoleum, attended by Olivia, the daughter of the deceased, and her husband, Allan. As the McKennas enter the mausoleum, reporters barrage Olivia with questions about her father’s connection to the six dead girls, while a television news reporter attributes the reclusive Raymar’s death to a heart attack. Following the ceremony, Olivia wonders aloud why she had so little contact with her father. Meanwhile, Julie and Steve enjoy an afternoon at a seaside amusement park, which ends with the couple arguing over Julie’s initiation in the Sisters. Despite Steve’s disdain for Carol, Julie insists on passing the initiation, hoping to change her reputation as a “nice girl.” The McKennas return home to find journalist Samuel Dockstader waiting for them. Dockstader, who was well acquainted with Raymar, tells Olivia of her father’s psychokinetic powers, which included a type of vampirism that allowed him to drain the life force from other creatures. His favorite victims were female hitchhikers, such as the six victims found in the apartment. Dockstader tried unsuccessfully to dissuade Raymar from these practices, and believes the psychic willed himself to die. He gives Olivia a cassette tape, which contains the narrative of a scientific study of Raymar and his abilities. That afternoon, Steve confronts Carol in her home, demanding that she stop persecuting Julie. Carol ignores Steve’s complaint and tries to seduce him, but he rejects her advances and leaves. A short time later, the Sisters drive Julie to the mausoleum, promising her membership in the club if she stays inside until morning. They offer barbiturates to help her sleep. Julie is hesitant at first, but accepts the challenge, and the girls watch as the caretaker unwittingly locks Julie inside. Julie tours the mausoleum, lighting her way with a votive candle from the chapel, then ensconces herself in a washroom. At the McKenna home, Olivia listens to the recording while Allan sleeps, and learns that Raymar once emitted a powerful bolt of electricity that, when deflected by a mirror, caused considerable damage to laboratory equipment. At the cemetery, Julie falls asleep after taking the barbiturates, unaware that she has actually taken Demerol, an opiate that causes dizziness and confusion. Carol and her fellow Sisters return to the cemetery, where they plan to dress as monsters and terrorize Julie. However, Leslie refuses to participate in the cruel prank and is left at the roadside. Unable to contact Julie, Steve searches for her at an arcade, where a girl named Lucy refers him to Leslie, who knows Julie’s whereabouts. Meanwhile, Olivia learns that her father had the ability to reanimate the carcasses of dead animals with his mind, and that he was obsessed with experiencing his own death. At the cemetery, Carol and Kitty enter the mausoleum through a window and wake Julie from her sleep. Donning a monster mask, Carol frightens the drug-addled Julie, who runs screaming from the washroom. Elsewhere, Steve learns of Carol’s plan from Leslie and goes to his girl friend’s aid. While searching for Julie, Carol and Kitty discover Raymar’s vault and discuss the circumstances of his death. Carol calls Raymar a “fake” and a “sicko” before she and Kitty resume their search. Moments later, the marble face of the vault breaks away and bolts of electricity emanate from inside, creating a hurricane-like effect. The two Sisters come upon the wreckage and assume Julie has gone berserk. They run to the exits, but find the doors locked. Olivia continues listening to the cassette, which reveals that Raymar’s power may remain active, even in death. Realizing that she has inherited some of father’s psychic ability, Olivia summons a vision of the mausoleum, and drives to the cemetery to rescue Carol and Kitty from an army of reanimated corpses. Raymar rises from the dead, and as electricity emanates from his eyes, the girls are buried under a pile of dead bodies. Steve breaks into the mausoleum and rescues Julie, but they are quickly surrounded by walking corpses. As Olivia enters the building, Raymar uses his power to draw Julie toward him and places his hands on her temples to extract the life from her body. Olivia intervenes by holding a small mirror to Raymar’s eyes, and he decomposes as his body absorbs the deflected energy. After assuring Julie and Steve that the danger has passed, Olivia helps them toward the exit.