Alberto Oliver, an unsuccessful pulp novelist, is attacked by alien mutants when he comes back from visiting his lover Carol. Soon he finds himself chased by a flying saucer that tries to abduct him and take him to a distant planet in an anti-matter galaxy.
A group of American tourists is traveling through Spain when two of them are murdered by a mysterious serial killer who removes an eyeball from every one of his victims. The tour presses on as the murders continue, with the travelers and the police trying to deduce which one of them is the killer.
A special detective is sent to Lisbon in order to investigate a series of murders. After looking into the murders, our hero realises that they are somehow linked to an illegal drug smuggling operation and so sets about looking into that in order to solve the murders and stop the smuggling from taking place.
Commissioner Mendoza must join forces with the honorable civil guard, to stop the activities of a network of drug traffickers with international contacts that intend to act in Spain.
