Anteojito is a poor orphan 10-years-old boy who lives with his Uncle Antifaz in an apartment house in a city named Villa Trompeta. Uncle Antifaz tries to invent an invisibility formula with Anteojito's help, and Cachavacha, a witch and Uncle Antifaz's neighbor who lives in the apartment right under his, tries to steal it as revenge for to his explosions destroying her apartment...