In Madrid, Spain, an omniscient narrator transforms Mari Loli and Merche, two beautiful sales clerks, into Susana and Casta, who flirt with Don Hilarión, an old apothecary, which arouses the jealousy of Julián, who is in love with Susana.
A young printer's relationship with his girlfriend is in trouble after she accepts another suitor's invitation to the fair. This adaption of a popular operetta aims to please with a simple storyline and goofy slapstick.
Pursued by an infamous song that makes her life impossible, Dolores leaves Calatayud.
