Luis is a 30 years-old man who lives in a Madrid's neighborhood with his absent-minded father and his dominant mother, who occasionally pretends heart attacks to keep Luis at her side. Luis passes his days viewing old movies in theaters and working in the ironmongery of his parents. Then, a day Luis watches a girl moving to his building. She is Julia, a free-spirit looking for her place in the world expert in bad relationships with married men. Although both are totally opposites, Julia and Luis fall in love, but Maruja, classic and old-minded Luis' mother, will try to separate them do not accepting Julia and her modern lifestyle. But the true trouble is Luis, unable to decide between his feelings by Julia and stay under his mother's wing, something that exasperates the own Julia.