The Gidoron empire is an ant colony far more advanced than mankind whose purpose is the conquest of the world, and genetically manipulate humans to turn them into androids fighting for them. Yammar, Akeba and Mamezo are three slaves who succeeded in escaping from the colony, but they can't seem to attract the peolple's attention on the danger afoot. Only Dr Midoro believes them and helps them in their fight against the Gidoron Empire.