couple Esther and Juan lives in the Mexican countryside raising fighting bulls. The couple have a pact since the beginning of their relationship: she can have sexual relations with other men, if she wishes, but she must always be extremely sincere with her spouse by talking openly about it. During a party they hosted, Juan notices an attraction between Esther and one of their guests, Phil, a horse trainer. So he encourages her to follow through on her desire. But he soon realizes that she tries to hide things.