A doctor and his wife travel to Maine to research the impact of the lumber industry on the local environment and begin to investigate a succession of mysterious and terrifying events.

When the current members of the very select Centennial Sporting club meet for a 100-year anniversary celebration, one of the younger men decides it’s time to “purify” the membership. His plan takes shape as the opening of a time capsule sets off a wild party and men suddenly revert to a savage animal level.