El fondo del mar The Bottom of the Sea Damián Szifron [videorecording]=

From case cover:
Toldeo (Daniel Hendler), de 25 a~nos y futuro arquitecto, sufre de celos agudos. Vive obsesionado con los movimientos y actividades de su novia Ana (Dolores Fonzi). Llegando a casa, descubre que su peor pesadilla se hizo realidad: hay otro hombre.
Paralizado, sale del departamento con una excusa tonta y lo espera afuera, para inciar una persecuci'on nocturna a través de la ciudad, con el objeto de descubrir la verdadera identidad del misterioso amante (Gustavo Garzón), pero que lo llevará finalmente a enfrentarse con la suya propia. From IMDb:
Toledo, 25 years old, future architect, suffers from an acute jealousy. He cannot concentrate on his job nor on his studies, being continuously mindful of his girlfriend and concubine Ana's whereabouts and activities. Toledo arrives home and has a long conversation with Ana, who constantly manifests a ridiculous desire of 'going out for a drink'. They lie in bed but all his advances are instantly rejected by a progressively more nervous Ana. He cannot explain her intermittent crying and disturbed reactions. Until she leaves to the kitchen and he finds out that under the bed a male shoe that does not belong to him is carefully hidden by a male hand, under his own eyes. Paralyzed by the discovery he is only capable of leaving with a stupid excuse, trying to hide from Ana the anguish that barely lets him breath. Toledo awaits on the street for the exit of Ana's lover and begins a one-of-a-kind persecution-investigation that will last the whole night, to find out, before confronting him,

DVD video; Dolby Digital 5.1; surround 2.0; NTSC; Region 4; 4:3 widescreen (letterboxed).

Spanish audio. Optional English and Spanish subtitles.