The story begins with a small (and somewhat slightly garbled) introduction to the history of the Statue of Liberty, followed by the main plot.
One night, Mortadelo overhears two suspicious fellows talking about blowing up the "estatua de la libertad" and immediately notifies El Super.
However, even before they have arrived in the States, Ofelia's enormous weight and actual lack of knowledge of the English language leaves Mortadelo and Filemon dead in the water, exacerbating their investigations.
They follow their scarce leads to Central Park, Harlem, a ship docking at New York Harbor, and even the Statue itself, but ultimately all of them prove to be red herrings.
As soon as they are back in Spain, however, Mortadelo and Filemon stumble across the two suspects, who talk about the demolition of the statue being imminent, and take up pursuit.