This is an unusual Italian movie in that it is a sequel to "La Orca", a film made only one year earlier (Italy in the 70's was infamous for cheap rip-offs, but not really for sequels). "La Orca" was a rather notorious film about a spoiled teenage girl (Rena Neihaus) who is kidnapped and has to use her sexual wiles to survive. This movie picks up right afterwards when she is taken back to her family and boyfriend. Her family is a little odd. Both her mother and father come in the bathroom, for instance, while she's in the tub after her ordeal (or maybe that was a normal thing to do in 1970's bourgeois Italy?). Her boyfriend insists on feeling her up on their first date after the incident, which triggers a sexual flashback from the first movie. But she is herself is obviously disturbed–she gets her boyfriend to take her back to the shack in which she was held in the previous film where, unable to persuade him to have sex, she masturbates (and further pads the running time with more flashbacks from the first movie).
After witnessing his mate and child's death from Nolan's hands, Orca, the killer whale, goes on a rampage in the fishermen's harbor.
The kidnappers in this movie though are pretty low-rent types, barely connected to the Mafia. Their victim is a very spoiled, but perhaps not especially rich, teenage girl (Rena Neihaus) whose parents seem unable–or perhaps unwilling–to get her back In this movie the youngest, most handsome kidnapper (Michele Placido) falls for the girl in kind of a reverse Stockholm syndrome, with tragic results for at least one of them. The end of movie, strangely enough, is kind of reminiscent of "Last Tango in Paris". This movie is very class-conscious in the way it has this poor Sicilian boy falling for a rich, northern girl (the Italian title "La Orca" comes from the designer outfit she's wearing).
After witnessing his mate and child's death from Nolan's hands, Orca, the killer whale, goes on a rampage in the fishermen's harbor. Under the villagers' pressure, Nolan, Rachel and an Indian sail after the great beast, who will bring them on his own turf.