Cult of Cetus

Two secret societies search for the gate to Atlantis in the ruins of an ancient Roman temple in Penzance.  One wants wisdom.  The other wants power.  Unbeknownst to both, an ancient monster waits deep beneath the sea.

This is a Cthulhu Mythos adventure for use with Professor Dungeon Master's Eldritch Hack (though it could easily be adapted for Call of Cthulhu).

Eldritch Hack can be found here: https://www.drivethrurpg.com/product/386049/Eldritch-Hack
(Sorry, Dan Master apparently hasn't put it up on BGE, apparently, because I couldn't find it here.)