Equinox

According to legend, a group of women escaped from Atlantis just before the destruction of the continent. They took refuge on a mysterious island, and founded a kingdom. Men who dared approach the island, were devoured by these sexually voracious Atlanteans, and thus they were called "gobblers".

When college student Bill Perry grows inappropriately fond of psychology professor Wilma Tuttle and tries to rape her, her self-defense inadvertently kills him. Wilma then moves Bill's corpse to a nearby beach and makes his death look like the result of a cliff diving accident. But her guilt over the incident builds, and Lt. Ted Dorgan begins to suspect that Wilma knows more than she's letting on.

A film producer murders his star actress during an erotic "game" and makes it look like suicide. The dead girl's lesbian lover discovers what happened, and plots her revenge.

A wealthy, eccentric chemical company owner sends his woman to get an American writer to take a mind control drug, Kemek, to verify its potential. She accomplishes her mission, but falls totally in love with the writer. The chemical magnate, satisfied with the results of the test, rewards her with murder, just as she is about to flee to Naples with her new lover. Her ex-husband and a private detective track the killer behind it all to a remote hideaway to unravel the solution.

After her twin sister mysteriously commits suicide, a lawyer begins to investigate and stumbles upon her sister's dark secrets.