Spain, 1950s. Montse's agoraphobia keeps her locked in a sinister apartment in Madrid and her only link to reality is the little sister she lost her youth raising. But one day, a reckless young neighbor, Carlos, falls down the stairwell and drags himself to their door. Someone has entered the shrew's nest... perhaps he'll never leave.
Arturo , a successful restaurateur, having an affair with his assistant Cristal, tells her that he will reveal the extent of their relationship to his wife Paz. Not long after Cristal starts dreaming of life as a housewife, their plans fall through. In revenge, Cristal focuses on Arturo's son, Arturito. She will endeavor to make Arturito her bridegroom at Arturo's expense, in all senses.
