From the publisher's website:
Journey to the sleepy seacoast town of Dove's Bay, Maine, and investigate what is rumored to be a "haunted" house - and confront once more the dread Cthulu Mythos and those twisted souls who serve it.
Grimrock Isle is 3 products in one:
1) A solo adventure consisting of a main solo and 5 subsolos, adding up to nearly 1000 entries!
2) A Group Scenario Book, with all the information needed to adapt the solo for group play, with provisions to which allow you to use the subsolos if the party separates!
3) A Campaign Book, with Grimrock Isle and three additional scenarios by Scott D. Aniolowski. This package provides you with an extended campaign in Dove's Bay, complete with hints on how to work all four scenarios into play. Includes over 30 handouts!
Do you dare to learn the truth lurking just beneath the surface? Do you have the courage to face this evil and withstand it? Are you clever enough to survive? The answers to these and many other questions await you on GRIMROCK ISLE.