***SPOILERS*** Like some evil Tinkers-to-Evers-to-Chance double-play combination we have in "Omen IV" the evil seed of the deceased AntiChrist Damien Thorn come back. Terrorizing his parents his schoolmates his neighbors and finally the entire world as a she named Delia York, Asia Vieila. After being given to a "deserving" couple the Yorks Karen & Gene, Fay Grant & Michael Woods,by the Catholic Church's St. Francis orphanage.
Little Delia didn't waste any time making her peasants felt by scratching her mom at a house party. Later Delia almost get killed by a runaway truck only to have herself saved by this "Devil Dog" named Ryder. Going to school Delia takes care of the local bully by getting the big guy to wet himself in front of all his classmates. Later when his father threatens the Yorks with a law suit she has his head sliced off in a self-induced traffic accident! Delia is someone that you never mess with if you know what's good for you.
Meanwhile Dalia's dad Gene becomes a big man in town on his own, or so he thinks, by getting elected to the congress as a champion of the clean air and green trees crowd instead of letting the smog and concrete boys take over the neighborhood with his eye now on he White House itself! Did his bratty and strange daughter Delia have anything to do with Gene York's sudden good fortune?
It's only later when Jo, Ann Hearen, is hired as Delia's nanny that the truth's comes out about her strange and evil powers. Jo a New Age type realizes that Delia is a bit weird, after turning all her white crystals black, and calls her New Age Guru Noah, Jim Byrnes, to come over and check her out. Noah is so upset by what he sees in Delia Kirilian color vibrations ,all black and blue with a little pinch of red, that it flips him out so bad that he almost crashed into Delia's moms car.
Taken on a trip to a psychic festival by Jo Delia turns the entire event into an inferno setting the place, through mental telepathy, on fire and heaving everyone there run for cover including poor Noah who was at the festival and ended up with his leg broken. The and shaken and battered Guru was so shook up by the whole experience that he later checked out of the country to become a hermit in the Tibetan wilderness.
Jo herself is later thrown out, with the help of the sweet and cuddly family pet Ryder, of a second floor window to her death because she knew and talked too much. It's when Karen is again pregnant that she decides, finally, to find out the truth about the real parents of Delia. That's when she,and we in the audience, come face to face with the truth. She's not only the feared AntiChrist of Revelations she's his twin sister! Her brother the AntiChrist himself is about to come on the scene as her kid brother the sill unborn Alexander York!
Three times were more then enough for the AntiChrist coming back to earth to bring about Armageddon. The movie going public were already getting a little tired of of him and his evil adventures. With a fourth really not necessary since Daimen Thorn, the original AntiChrist, had been dead and buried for years. Were put through the usual ringer with no one believing that little Delia is "Thee" AntiChrist until it was almost too late to stop her in her deadly rounds of destroying the entire human race. The movie as bad as it is is also far too long, 97 minutes, for a horror flick that could well have told it's story is as little as 80 minutes.
Having a private eye Earl Knight, Mchael Learner,and later a former Catholic nun sister Yvonne,Megan Lehch,and now faith healer Felichy in the film only to be killed off didn't help the plot either. It only prolonged the suffering of those of us watching the movie. You could see the surprise ending coming almost as soon as the film "Omen IV" began with the bases being cleared for Delia's eventual takeover of the civilized as well as uncivilized world. What was a bit of a surprise was Delia doing it with a little help from friends.