Quincy, Lee and Danny are all in Lake Tahoe together. Quincy is there for a forensic Pathologist convention and the others for a weekend break. While they are there the guests and staff start coming down with some kind of strange illness. Quincy and a couple of other Forensic Pathologists are called in to help but when some of the patients start dying they still have no clue as to what is killing them. To make things worse the casino owner does not want to admit that anything is wrong, as it will affect his bookings and profits.