RATS DON'T SLEEP AT NIGHT Starring : Paul Naschy, Silva Solar, Olivier Mathot, Richard Palmer,Yul Sanders, Victor Israël, Evelyn Scott Directed by : J. Fortuny Director of photography : Raymond Hail Music : Daniel J. White Story by : A.T Mariaux, J. Fortuny

After a hold-up, Jack Surnett, a gang leader, is wounded on the head by the police. He is taken to a hospital where the surgeon declares that in order to save the gangster, a brain transplant must perfored. Surnett's men go in search of another gang leader whose morphology is identical to Surnett's. They find him and the graft is successful. Surnett is rapidly back on his feet again but he is no longer the same man. He sows terror in town and in the countryside. The men of the victim's gang attack the hopital. Then the police and the residents of the town attack the hospital.