When Deckard Cain returns to the ruins of Tristram Cathedral seeking
clues to defeat new stirrings of evil, a fiery harbinger of doom falls
from the heavens, striking the very ground where Diablo once entered the
world. This fire from the sky reawakens ancient evils and calls the
heroes of Sanctuary to defend the mortal world against the rising powers
of the Burning Hells once again.