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....
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A small village in Huelva, Andalusia, Spain, 1936. Higinio and Rosa have been married only for a few months when the Civil War breaks out. Higinio, being afraid of possible reprisals from the rebel faction, decides to use a hole dug in his own house as a temporary hideout....