chunk: In Aroostook County, Maine, Marine fish and Game officer Walt Lawson is attacked and bitten in half by something unseen in Black Lake. Sheriff Hank Keough (Brendan Gleeson), Fish and Game officer Jack Wells (Bill Pullman), American Museum of Natural History paleontologist Kelly Scott (Bridget Fonda), and mythology professor/crocodile enthusiast Hector Cyr (Oliver Platt) go to the lake to investigate.
  A series of strange events occurs, including Kelly and Hank's canoe mysteriously flying into the air and flipping, the discovery of a severed toe and a severed moose head, and the decapitation of Burke, one of Hank's deputies.