It's Diego and Lucia's wedding day. After the wedding, Lucia's two daughters move in the Serrano house with Lucia where Diego and his three sons lives. There are some problems with that because the sons and the daughters don't like each others.
After the visit at the school psychologist, Diego and Lucia notices that their upbringing methods are really different and Diego feel like he is a bad father and he wants to become a better one. But the children don't adore his actions.
Eva and Teté's father promised to take them in Paris but then he couldn't do that and the girls were disappointted. To make them feel better, Diego bought tickets to Paris for the whole family and the meantime Diego struggles with the money problems.