Watch Don't Go Near the Park

"Don't Go Near The Park," also marketed as "Nightstalker" and "Sanctuary for Evil," is an American horror film from 1981. It begins in the days of cave-dwellers, with a brother/sister team being cast out from their tribe for their cannibal activities. Despite the horror of their actions, the curse placed upon them is the only thing that keeps them alive. The film eventually reaches the modern day, with 12 millennia of murderous activities having passed the siblings by, they've finally decided to purge themselves of their curse by seeking immortality. All they'll need is the soul of a virgin.