From the back cover:
Solitaire Adventure by the Lakeshore
Set in the 1920s, Alone Against the Tide is a solo horror adventure for the Call of Cthulhu roleplaying game. You take on the role of an investigator traveling to the affluent, scenic, and remote lakeside town of Esbury, Massachusetts. You decide your pathway through the story by choosing from the options presented. Your choices not only affect what happens to your investigator, but also the fate of Esbury’s residents and visitors—even the town itself!
You may choose to create your own investigator or use the ready-to-play investigator, Dr. E. Woods, a professor of archaeology from Miskatonic University. There are a variety of reasons for visiting Esbury, but almost all are tied in some way to Esbury resident, Professor William Harris.
What has Professor Harris’ research got to do with the strange green fog enveloping the town? Who are the menacing, dark-suited men that arrived on the ferry with your investigator? And, why is a Buddhist monk visiting Esbury, a town more used to entertaining New England’s wealthy elite?
Armed with a pencil, some roleplaying dice, and a copy of the Call of Cthulhu: Keeper Rulebook or the Call of Cthulhu Starter Set, you are ready to brave the mist-shrouded streets of Esbury.
Dare you take on the challenge?