From publisher blurb: Troll Bridge is a Fifth Edition plug-in adventure for four characters with an average party level (APL) of 3, 5, 8, or 11. This addon offers a general guideline on how to scale the adventure for each level. The troll Zulgeteb and his minions have taken residence in caves underneath a bridge on an important trade route and use their position to ambush merchants and travelers. If the characters want to ensure that the road is safe once more, they must brave the traps and enemies within the caverns until they encounter Zulgeteb himself.