María Alonso

Arturo , a successful restaurateur, having an affair with his assistant Cristal, tells her that he will reveal the extent of their relationship to his wife Paz. Not long after Cristal starts dreaming of life as a housewife, their plans fall through. In revenge, Cristal focuses on Arturo's son, Arturito. She will endeavor to make Arturito her bridegroom at Arturo's expense, in all senses.

Max is a Jack Russell dog genetically modified for criminal purposes so he is able to talk. Running away from the criminals he's working for, he is wounded, then saved by detective-wannabe Alberto, who is fire and house-hunting. They end up staying with Alberto's sister-in-law Marta and her two children. Thanks to them all, Alberto finally manages to be a detective, and he and Max establish their detective agency: Sabuesos.