Gustavo is a child with a lot of imagination, a big heart and very few lights, who thinks that putting a sweater on his shoulders gives him super powers. Manoli, his mother, goes out of her way to help him, but that doesn't stop her from also being aware of everything that is going on around him, including the affairs of her husband Matías, a man from another era, from the cave era to be precise, who devotes himself to something that nobody knows very well what it is, but that has all the appearance of being illegal.
Gustavo is secretly in love with his cousin Macarena, a vitalist girl, proud and a bit conceited, who doesn't keep track of her boyfriends. Anthony, Macarena's teenage brother, doesn't stop picking on Gustavo. Luckily, he gets along with Emilio, his other cousin, a very joking boy who doesn't know who his father is, but who looks suspiciously like the neighborhood priest. In addition, his neighbor Santi and his cat Cervecita will make Gustavo's life very entertaining.