Mary, Mary, Bloody Mary 1975

Van breaks down during storm

Mary Gilmore's van stalls in a fierce thunderstorm in rural Mexico. She discovers an abandoned house nearby and is joined by a vagrant named Ben who offers to spend the night. They decide to seek shelter inside together.

Ben offers company for the night

Ben repairs the van while they settle into the house for the night. Their uneasy conversation hints at a wary companionship, yet Mary accepts his presence. The storm rumbles outside as they prepare to sleep.

Mary recalls murder and vampiric blood

Inside the house, Mary has a vivid memory of seducing a United States Embassy employee and draining him of blood. She keeps the disturbing recollection to herself as the night deepens. The memory foreshadows how violence will touch her life again.

Investigators begin tracing a pattern

FBI inspector Otis Cosgrove and Lieutenant Eduardo Pons begin connecting a string of murders. They discover that victims were drugged and drained of blood, forming a disturbing pattern across the region. The case tightens as new details emerge.

Day at the beach provides a reprieve

Ben fixes the van and the two spend the day by the beach. They share the coastal scenery, offering a temporary escape from danger. The afternoon sun softens the mood before danger returns.

Mary murders a fisherman

While Ben goes to buy fish, Mary drugs a middle-aged fisherman with coffee and then stabs him, drinking his blood. The act deepens the sense that she is drawing closer to a predatory identity. The incident raises the investigators’ suspicions back in town.

Mary reveals her father painting

Back at Mary’s home, she shows a painting of her father, claiming he died when she was young. The artwork hints at a troubled lineage and a possible source of her strange allure. The moment adds another layer to her enigmatic character.

Masked killer strikes in the morgue

In the morgue, a masked man breaks in to view the fisherman's body and murders a morgue employee in the process. The intruder’s presence confirms a broader danger and ties the sequence of killings to a nocturnal predator. The identity of the attacker remains unclear for now.

Greta’s murder at an art show

Art dealers Greta and Arnold Jenson attend Mary’s show. Greta invites Mary to her home and tries to seduce her, but Mary drugs Greta’s tequila and, when Greta kisses her, she stabs her throat. The murder expands the trail of blood-drained victims.

Interrogation over Greta’s murder

The following day, Cosgrove and Pons question Ben and Mary about Greta’s murder and press Ben for an alibi. Suspicion begins to tilt toward Ben as the investigation widens. Mary watches the proceedings with quiet tension.

Young girl’s death points to Mary's father

A young girl who hitches a ride with the masked man is attacked and, after escaping into the woods, is stabbed to death. It is revealed that the attacker is Mary's father, suggesting a terrifying new threat tied to Mary’s lineage. Mary grows unsettled as the mystery deepens.

Party horror and a kidnapping attempt

At a party attended by Mary and Ben, Mary’s father murders a young dancer and disguises himself in the dancer’s costume. He then tries to kidnap Mary, forcing her to flee into the night. The family threat becomes imminent.

Cemetery escape and pursuit

Mary flees to a nearby cemetery while her father murders a gravedigger. Cosgrove and Pons stake out Mary’s house, and the chase continues across the woods and road as the killer pursues them. The danger escalates as multiple lines of pursuit converge.

Confrontation: killer dies and Ben falls

In a climactic confrontation, Ben regains consciousness and shoots Mary's father with Cosgrove’s gun, killing him. Mary then drinks her father’s blood and stabs Ben, feeding on him. The immediate threat subsides, but a personal tragedy remains.