In the 1985 series Héctor de Rodas, played by Narciso Ibanez Menta, is writing his new book “Theory and Practice of a Perfect Crime”. Hector convincingly demonstrates that the perfect crime occurs whenever there is no link between the criminal and his victim. Summoning four assassins to his mansion, each is told they must kill a randomly chosen person. To confuse the investigators, a small rubber, black octopus must be left on each of the victims. In this new film version de Rodas summons four ordinary citizens, who he will coerce into committing these murders with a display of evidence that incriminates each of them, in a criminal or shameful act. Hector De Rodas intends to demonstrate his new theory: Anyone, no matter how good, is capable of murder.