Count Yorga, Vampire

Donna hosts a séance in Los Angeles while Count Yorga oversees the gathering. It is revealed that Yorga knew Donna's mother and pressed for her burial rather than cremation. Donna cannot recall seeing him at her mother's funeral.

After the party, Erica and Paul drive Yorga home, but their van becomes stuck in the mud and they must spend the night on the road. Yorga, now revealed as a vampire, attacks and bites Erica during the ordeal. The group remains unaware of the full danger as dawn approaches.

The following day the couple reaches Los Angeles, unable to recall what happened during the previous night. The memory gap hints at the peril they've faced and the forces at work behind the scenes.

Dr. Jim Hayes inspects Erica's wounds and confirms significant blood loss. He begins an emergency transfusion while the group pleads for her survival, and Erica pleads with Paul to forgive her and to kill her rather than let her turn.

In Yorga's basement throne room, his two vampiric brides awaken, one of whom is Donna's mother. Yorga commands them to engage in carnal rites as part of his vampiric ritual. The basement becomes a staging ground for the terror to come.

That night Yorga visits Erica, promising immortality. He drains her blood and takes her body to his manor, transforming her into one of his brides.

Paul enters Yorga's mansion to rescue Erica. Yorga chokes Paul to death, and Brudah breaks Paul's back.

Michael informs Hayes that Paul has gone to the mansion. Hayes's girlfriend suggests involving the police, but they are dismissed as pranksters amid a rash of similar calls. The group resolves to confront Yorga themselves.

Hayes, Michael, and Donna visit the mansion to inquire about Paul's disappearance and to keep Yorga occupied until sunrise. Hayes distracts Yorga while Michael and Donna observe. Brudah rebuffs Michael's attempts to explore.

With daylight looming, Hayes and Michael plan to kill Yorga in daylight. They study vampire lore while waiting, but exhaustion overtakes them and they fall asleep.

Yorga telepathically awakens Donna and has her sabotage Michael's alarm clock before she comes to the mansion. There, Brudah rapes her.

Michael awakens and finds Donna gone. He and Hayes rush to the mansion as night falls, armed with stakes and crosses. The trio heads inside to confront Yorga and his brides.

Hayes leads Michael to the basement where he finds Erica's corpse among the dormant brides. He attacks Yorga with a cross and a stake, while calling for Michael to help.

Michael finds Paul's mutilated body. Brudah attacks Michael, who mortally stabs him.

Michael confronts Yorga and Donna's mother; Yorga pushes Donna's mother into Michael's stake and flees. Michael pursues Yorga and kills him with a stake. Erica and the remaining bride attack Michael; he fends them off with a cross and locks them in a cellar, but drops the cross. Donna, now fully transformed into a vampire, lunges at Michael and kills him.