Eleventh Hour

From publisher blurb: Eleventh Hour is a 5th Edition adventure for 3-7 characters of 5th-level and is optimized for four characters with an average party level (APL) of 5. This adventure sees the party investigating a seemingly ancient dungeon to travel back in time and stop a calamity. The mining settlement of Harken hugs the winding paths of the western mountains. Nearby stands an ancient monument that lies nearby, a large domed structure thought to have been created by the giants of a passed age. All of this, however, is about to be forgotten, as a powerful mage seeks the town's destruction and nothing, not even the town's defenders, will be able to stop him.