In the near future (2018), a prisoner named Dante (William Miller) escapes from jail after having been arrested for illegally entering Spain. Forced to kill a prison guard, he is hunted down by the prison's dog, a monstrous Rottweiler police dog that sadistic prison warden Kufard (Paul Naschy) had revived and cybernetically enhanced after a fatal injury. Believing his Spanish girlfriend Ula (Irene Montala) was sent to work as a prostitute in Puerto Angel as punishment, Dante looks for her, but is exhausted by the chase and wounded by the Rottweiler. As a result, he starts having hallucinations and being haunted by the repressed memories of his and Ula's arrest.