After a freak accident aboard a test flight bombards them with radiation, permanently altering their genetic structures, four adventurers use their incredible powers for the good of mankind and to protect the world from the forces of evil...despite their very real problems, worries and arguments. But soon they must face the diabolical and destructive plans of their ultimate enemy: Dr Doom, a brilliant man hungry for forbidden knowledge and thirsty in his obsessive pursuit of profit and revenge...