DON'T GO NEAR THE PARK

After being cursed by their mother, Petranella, Tra and Gar, a caveman brother and sister, are forced to live by preying on young people, devouring their entrails to retain their youth. The nature of the curse allows it to be lifted after 12,000 years— an entire cycle of the zodiac— after which one of the siblings must conceive a child to use as a virgin sacrifice to achieve immortality.

Millennia later, in 1965, the siblings subsist by stalking young people in a L.A. park, consuming their entrails to imbibe their life force. As the 12,000 years end, Gar plans to conceive a child. Using the name Mark, he rents a room in the home of a beautiful young woman and soon marries her before conceiving a daughter, Bondi. Mark becomes obsessed with Bondi's welfare, and his attention to her causes his marriage to disintegrate in the intervening years. On Bondi's 16th birthday, Mark gives her an ancient amulet from his mother. After promising not to, Bondi's father argues with her mother and leaves the house during the birthday party, abandoning them.

Bondi subsequently runs away, hitching a ride with three adult male hippies. When they attempt to gang rape her in the back of the van, Bondi invokes her father, clutching to the amulet, which begins glowing. The van begins to drive out of control, crashing off a rural bridge before bursting into flames; Bondi survives, however, transported away from the crash. Bondi wanders into an abandoned house near the park, where Tra, withering from her lack of sustenance, resides in seclusion. Bondi is unaware that Tra, who calls herself Patty, is her aunt. Tra immediately recognizes Bondi upon seeing the amulet.

Bondi is met by Nick, an 8-year-old boy who has been taken in by Patty and sees her as a grandmother figure. She also meets Cowboy, another runaway who lives there. Bondi is initially terrified by Patty's grotesque appearance, but Nick and Cowboy assure her that she is harmless and that she uses her appearance to scare other people away. Cowboy explains that Patty dons a cloak to appear as a witch and has concocted a tall tale about the land suffering "Petranella's Curse" to keep people away.

Meanwhile, while selling flowers on the street, Nick meets Taft, a local writer and historian who befriends him. In conversations, Taft explains the dark history of the local park and the centuries-old deaths there, warning Nick not to go near it.

Late at night, Nick sees Patty enter the park wearing a mask and follows her. He watches from a distance as she strangles, disembowels, and cannibalizes a female victim. When she removes the mask, her youthful appearance is restored. Horrified, Nick flees back to the house to notify Bondi and Cowboy, but finds the house empty.

Meanwhile, having been drugged by Patty, Bondi awakens in a cave alongside Cowboy. She is confronted by her father, who attempts to assault her, but Patty intervenes and stops him. After they fight, a fire breaks out in the cave, and Patty urges Bondi to swallow the amulet, which she does. Upon doing so, Bondi becomes possessed by Petranella, taking on her withered appearance. Petranella reanimates the corpses of Patty and Mark's victims, which they have stored in the cave, and forces them to kill and consume Mark and Patty.

After Petranella's spirit leaves Bondi's body, Bondi and Cowboy flee and find Nick in one of the tunnels. They escape through a crumbling cave wall with the help of Taft, who has been searching for Nick in the park. The three spend the night at Taft's home and return to visit the ranch where they have been living with Patty. Upon arriving, they are notified by a city official that the house is being demolished. Pondering where to go, the three venture wander until they find a playground. Nick climbs a slide and asks Bondi to push him down. Instead, Bondi begins to dig her fingernails into his abdomen to disembowel him. As he screams, the camera freezes on her smiling.