From the publisher's blurb:
A level 2 adventure for Mutant Crawl Classics RPG!
After a tsunami from the inland Monster Sea nearly washes away your jungle homes, you notice that there’s a new, unknown island laying offshore. Sent out to investigate in dugout canoes, you quickly discover a lost scientific installation of the Ancient Ones, along with the intra-dimensional horrors that they should have left alone but did not. All that’s required to reawaken these impossible 4-dimensional entities after millennia spent in dormancy is the touch of a sentient hand.