In Transylvania, the Fantastic Four find a ruined castle. Ben is summoned by Diablo and unable to resist, opens Diabolo's prison, unleashing him and later brainwashing Ben. Diablo tricks the world into thinking he has the power to help them. The world then realizes what a fraud Diablo really is. The Fantastic Four seize this opportunity to attack Diablo's castle. After getting far in the dungeons, the four get captured. Ben escapes, releases the others and they defeat Diablo.