Sting of Death

A young blonde woman lies sunbathing on a Florida dock, listening to a transistor radio. She turns it off after hearing a news report about unexplained local murders. Then a monstrous hand rises from the water and drags her under, and she drowns.

Five of six college friends arrive at Dr. Richardson's home, joining Karen and the others. Ruth has not joined them on the patio for a cold glass of orange drink.

A poolside scene unfolds as raucous college students taunt Egon, Richardson's mildly disfigured helper who secretly loves Karen. The taunting sparks Egon's resolve to take revenge.

Egon uses his resources to transform himself into a half-man, half-jellyfish creature. The transformation marks the birth of a murderous creature who will target the group.

Ruth is the first victim, killed by the monster as she suns by the water. Her death shows that the creature is already targeting the group.

Louise is seriously injured in the pool during the party, heightening the panic among the guests. The incident signals that the danger has escalated from a single attack to a wider threat.

Donna is killed while being chased through a swamp. The monster pursues the group through the estate's grounds, leaving a trail of carnage.

During the search for Donna, Jessica becomes another victim of the creature. The group's attempts to locate missing friends only deepen the sense of danger.

Susan is murdered while showering in the house. The killer uses a vulnerable moment to strike as the group's numbers dwindle.

The monster slashes a hole in the hull with an axe, causing the boat to sink and many students to drown. A school of Portuguese Man O' War jellyfish swarms the water, adding to the carnage.

Egon forces Karen to swim to his secret underwater laboratory, a cave beneath the coast. There, a giant Portuguese Man O' War sits in an aquarium connected to Egon's transformation machine.

John fatally injures Egon during a confrontation and rescues Karen. As they surface, the transformation machine explodes, destroying Egon and his evil alter ego.