 Tarzan befriends the king, Adendrohahkis, and the prince, Komodoflorensal, of one such city-state, called Trohanadalmakus, and joins them in war against the onslaught of the army of Veltopismakus, their warlike neighbours.He is captured on the battle-ground and taken prisoner by the Veltopismakusians, whose scientist Zoanthrohago conducts an experiment reducing him to the size of a Minunian, and the ape-man is imprisoned and enslaved among other Trohanadalmakusian prisoners of war.He meets, though, Komodoflorensal in the dungeons of Veltopismakus, and together they are able to make a daring escape.