This is a tier 2 (level 7-8) adventure about a mind flayer outcast who escaped the neural influence of the local elder brain. The illithid traveled far and settled down in an abandoned ancient temple under the city's cemetery. He devised a variant ceremorphosis process that causes humanoids to become mindless, loyal followers who obey his commands unquestioned. The disparate group is called 'The Immortals'. They lure new members with promises of immortality or the cure to a chronic ailment. Once at the temple, the illithid implants a mutated tadpole on their brains to begin the transformation.
The city offers a hefty bounty to anyone who manages to stop the cult. Perhaps a group of valiant warriors with step up to the task.
This adventure has it all. There are roleplaying opportunities, underground exploration, and a BBEG mind flayer with obscure intentions.
- from the publisher's blurb