An Infernal Puzzle Box, delivered by a Hellrider of Elturel, has been stolen from the party of adventurers. Determined to reclaim their box of infernal secrets, one of Zariel’s minions has slain and secretly replaced an adventurer, unbeknownst to the rest of the members! In , it’s up to you to determine WHO has been replaced by a devil in disguise, WHAT weapon was used in the execution, and WHERE in the Forgotten Realms the Infernal puzzle box could be hidden.