Unfaithful Wife (1986)

The film concerns the attempts of Fidel to resume a normal life after the devastation wrought by his wife's death. He returns to his old friend Crispin and his wife Irene. A tentative effort with another woman fails, and Fidel finds himself in Irene's arms. That same evening, a young girl is brutally murdered. Fidel, unable to account for his whereabouts, is named the principal suspect, which later leads to his imprisonment. Crispin, meanwhile, learns of Irene's infidelity; his friendship is put to the test when Fidel escapes, gets wounded, and asks Crispin to kill him and put him out of misery.