A detective investigating a brutal rape and murder is drawn into the life of a suicidal woman whose husband he suspects of committing the heinous crime in director Antonio Chavarrías' tense psychological thriller. Depressed and suicidal at the end of a raucous street party, Celia attempts to take her own life by lying on the railroad tracks. When the body of a young rape victim is discovered not too far from the site where Celia attempted suicide, police inspector Miguel Ángel pays a visit to Celia and her husband, Agustín, in hopes that something they saw that night may lead to the identification of the killer. Later, when clues lead Ángel to Celia's sisters, Carmen and Ángela, the detective finally gains enough evidence to arrest Ángela's former boyfriend Pedro in connection with the crime. But something still isn't right, and as Ángel strikes up an amiable friendship with Carmen's ex-husband Jaime, he soon begins to suspect that it may in fact be Agustín who is the true killer. His judgment clouded at seeing his own mental instability reflected in the emotionally shattered Celia, Ángel soon begins to discover that beneath the suicidal girl's benign and peaceful existence there lies a horrifying, and potentially deadly, secret.~ Jason Buchanan, All Movie Guide