In Spain of 1972 a student couple decides to test the marriage before marrying in reality in order to prevent a irremediable failure. But this was like a revolution for the catholic society of this time.
Afther their wedding ceremony, Fernanda and Cosme Martínez go to a luxury hotel to consummate. They receive there some gifts and they find one fabulous diamant bracalet with a note for Fernanda thanking her for unfforgetable nights. Cosme feel jelause and Fernanda offended and during their wedding night they go from one place to another to find out the misunderstanding.
Man wants to dump wife for a new girlfriend; all three end up weekending in Acapulco together along with a gentleman the wife meets enroute, and all four explore the possibility of forming new relationships.
