From the back cover:
Deep in the big woods of Canada, you canoe up the "river of power", the mysterious North Hannimah, in search of the unknown. An anthropologist, you have brought your best students, and an Indian guide. It will take all of your combined skills, ingenuity, and luck if any of you are to survive after daring the forces of the north.
ALONE AGAINST THE WENDIGO is a deadly solo adventure for CALL OF CTHULHU role-players. In it you become L. C. Nadelmann, dashing young professor from Miskatonic U.
Characteristics for all the expedition members are specified, as are the skills for your player-companions. You allot the skill points for Dr. Nadelmann at the start of each attempt to uncover the secrets of the mysterious valley.
The final tally of your Hannimah Mythos points determines relative success of each trip to the valley, but the real success is in just surviving — for the fame and fortune so deservedly yours, so tantalizingly out of reach, is sternly guarded by unfathomable entities.
Life is risky, alone against the wendigo.