This is a very rare Italian/Spanish co-production. An unhappily married woman plots against her epileptic husband with his twin brother. They can’t be rid of him by means of murder; if they kill him, they would lose all the money they will otherwise control if the husband is instead driven mad and then locked away. They go to unbelievable lengths to rip his mind apart and drive him insane in an effort to be free of him! There is a blackmailer with nothing left to lose who arrives on the scene to further complicate matters. In true gialli style, nothing is as it seems and before it’s all over death will come to call! An amazingly tense psychological battle is played out with fantastic cinematography and stunning use of color that further highlight the emotional turmoil of a man no longer capable of recognizing his own reality! Franco Micalizzi provides an uncharacteristic yet impressive score.