Impersonating his friend and rival Thor, Hercules (with Zeus in tow) has traveled to Svartalfheim. Here in the home of the Dark Elves, he plans to head off an invasion of Midgard (the world of mortals) by Queen Alflyse. But his failure to understand the situation (or the courting rituals of Dark Elves) leads him to the head of her conquering armies.

Fortunately, the Warriors Three have a plan to extricate Hercules from this situation... with the help of The Incredible... Thor!