Glass Ceiling

A lonely housewife, Marta (Carmen Sevilla), hears footsteps in her apartment at night and suspects her neighbor, Julia (Patty Shepard), of killing her husband, Carlos (Fernando Cebrián). As Marta investigates, she uncovers a web of deceit involving her husband's affair with Julia. In the end, it is revealed that Carlos had arranged for Julia to kill Marta, but Ricardo, their downstairs neighbor and sculptor, intervenes and kills Carlos instead.