Three mysterious talismans, three bizarre characters out of this world, and four adventurers who, apparently, have nothing in common, are thrown together into another dimension that will bring them to the Island of Sitnatia. The ruthless Reginald Catchpole and his cockney sidekick Sid, the kind and generous schoolgirl Amelia and the gentleman cat burglar Arthur Pound, embark on a journey with many ordeals and the strangest encounters, such as the freakish Gnarg people, riding ratlike creatures, and an old evil witch who lives in an giant invisible bird-house. The four of them show great courage by helping the Vendra, a lost Roman Legion, fight back the invading Gnarg advancing from the depths of the Earth. An incredible adventure in which they discover what really lies behind the three strange guides who accompany them: a little Chinaman, a leprechaun and a wise old man, each of them linked to a talisman. Nothing is what it seems. The moment of truth awaits the four adventurers in the temple at the heart of the volcano towering above the Island of Sitnatia.