A Madrid couple, Elena and Alberto, seem to have a happy marriage complete with professional success and a loving son. Elena (Cecilia Roth) stumbles across infidelity, however, when she finds a hotel receipt in Alberto's pocket. Discovering Alberto (Jordi Molla) has been unfaithful is now not a surprise to her, but who Alberto is having the affair with does cause a shock. Alberto has been involved with another man, Diego (Javier Bardem), for some time. Unable to leave his idealized life behind, Alberto now struggles to save his marriage and forget his feelings for the sexy Diego.