Items have been returned to the duke's mage. Who just happened to not be a good guy. Another mage broke in and tried to stop him afterwards, but to no avail. There was a nasty mage fight in which the adventurers were transported back to the future…. Just an alternate reality of their future, in which a portal to the levels of hell have been opened and devils and demons have come through to rule the world. Now the party needs to find items to get to a hall in which they can travel time and space easily, to hopefully get back and stop themselves from doing what they did, or they need to close the portal to hell and just cleanse the world that way. their choice.