In Madrid of the 20's, many women were hired as wet nurses for middle class families. Milk is paid very well, so women are turning to the honest services of Paco, glazier by trade, which completes his monthly salary getting pregnant the clients who pay for it.

Unable to put a single word on paper, a youngish man with one novel to his credit finds that his life is crumbling to ruins around him because of his severe case of writer's block. He tries every remedy known to man and makes up a few new ones in this comedy. All his efforts are futile: he loses his girlfriend and his apartment and has a succession of misadventures until finally, homeless and hospitalized, he rediscovers his inspiration.

Industrious accountant David Martinaud claims to be visiting his parents every weekend, but it's merely a cover for the labor-intensive refurbishing of his country cottage. The reason for David's secrecy is that his childhood crush, Lise, lives nearby, and, although she's married, he still believes they'll get together. His devotion to the idea borders on mania, and, when Lise's husband is accidentally killed, he quickly spirals out of control.