CLUE: Dungeons & Dragons classic board game

"The secret we should never let the gamemasters know is that they don't need any rules.”

An Infernal Puzzle Box has been snatched from the gathering of swashbucklers by a Hellrider of Elturel. One of Zariel's henchmen has slain and subtly replaced a swashbuckler, unbeknownst to the rest of the people, in order to regain their container of wicked special insights! It's up to you to find out WHO has been replaced by a villain in disguise, WHAT weapon was used in the execution, and WHERE in the Forgotten Realms the Infernal riddle box could be hidden in CLUE: Dungeons and Dragons.