The film is about a couple from Madrid, Elena (Ariadna Gil) and Alberto (Jordi Molla). They have a happy marriage, professional success and a loving son. But later, Elena finds a hotel receipt in Alberto's pocket and discovers that he has been unfaithful to her. To her surprise, the one who has been involved is another man, Diego (Javier Bardem). Alberto is struggling to save both his marriage and forget his feelings for Diego, but fails. Finally, everything comes to an end when Elena confronts Diego, who didn't know Alberto was married, and kicks Alberto out of the house. Leaving Diego's home aggrievedly after a fight, Alberto is killed in an accident.
The movie ends with Elena and Diego becoming sort-of friends.