Délia, an active and intelligent girl, Fermí, who always speaks in rhyme, and Conrad, an accomplished gourmet, are three good friends who make up the “fearless gang”. Among the things that guide them, they have two fundamental aims: to prevent the construction of a large estate on Pirates Beach, the only virgin area of the coast, and to find the hidden treasure of Captain Ferotge (“Ferocious”), who, from beyond the grave, has sent them a coded message telling them where it can be found. The treasure is hidden in the large department store Los Tres Elefantes (The Three Elephants), whose owner speculates in real estate and intends to build on Pirates beach. Finally, the gang finds the treasure and succeeds in getting the owner arrested for illegal dealing in antiques.
The supernatural touches and ecological awareness of this particular adventure classic produce a combination of a flowing rhythm with a great sense of humour and satire. The presence of the friendly Mr. Perkins, a naughty chihuahua, brings fun to the comings and goings of this original trio.